Ajout du FR

Ajout du FR + correction du "functions.php"

phpbb/install/console/command/install/config/show.php

@@ -0,0 +1,123 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\install\config;
+
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class show extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 */
+	public function __construct(language $language, factory $factory)
+	{
+		$this->iohandler_factory = $factory;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('install:config:show')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_SHOW_CONFIG'))
+		;
+	}
+
+	/**
+	 * Show the validated configuration
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', $config_file));
+
+			return;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return;
+		}
+
+		$processor = new Processor();
+		$configuration = new installer_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return;
+		}
+
+		$style->block(Yaml::dump(array('installer' => $config), 10, 4, true, false));
+	}
+}

phpbb/install/console/command/install/config/validate.php

@@ -0,0 +1,124 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\install\config;
+
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class validate extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 */
+	public function __construct(language $language, factory $factory)
+	{
+		$this->iohandler_factory = $factory;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('install:config:validate')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_VALIDATE_CONFIG'))
+		;
+	}
+
+	/**
+	 * Validate the configuration file
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', array($config_file)));
+
+			return 1;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return 1;
+		}
+
+		$processor = new Processor();
+		$configuration = new installer_configuration();
+
+		try
+		{
+			$processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return 1;
+		}
+
+		$iohandler->add_success_message('CONFIGURATION_VALID');
+		return 0;
+	}
+}

phpbb/install/console/command/install/install.php

@@ -0,0 +1,210 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\install;
+
+use phpbb\install\exception\installer_exception;
+use phpbb\install\helper\install_helper;
+use phpbb\install\helper\iohandler\cli_iohandler;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer;
+use phpbb\install\installer_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class install extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var install_helper
+	 */
+	protected $install_helper;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language			$language
+	 * @param factory			$factory
+	 * @param installer			$installer
+	 * @param install_helper	$install_helper
+	 */
+	public function __construct(language $language, factory $factory, installer $installer, install_helper $install_helper)
+	{
+		$this->iohandler_factory = $factory;
+		$this->installer = $installer;
+		$this->language = $language;
+		$this->install_helper = $install_helper;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('install')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_BOARD'))
+		;
+	}
+
+	/**
+	 * Executes the command install.
+	 *
+	 * Install the board
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$this->installer->set_iohandler($iohandler);
+
+		$config_file = $input->getArgument('config-file');
+
+		if ($this->install_helper->is_phpbb_installed())
+		{
+			$iohandler->add_error_message('INSTALL_PHPBB_INSTALLED');
+
+			return 1;
+		}
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', $config_file));
+
+			return 1;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message(array('INVALID_YAML_FILE', $config_file));
+
+			return 1;
+		}
+
+		$processor = new Processor();
+		$configuration = new installer_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return 1;
+		}
+
+		$this->register_configuration($iohandler, $config);
+
+		try
+		{
+			$this->installer->run();
+			return 0;
+		}
+		catch (installer_exception $e)
+		{
+			$iohandler->add_error_message($e->getMessage());
+			return 1;
+		}
+	}
+
+	/**
+	 * Register the configuration to simulate the forms.
+	 *
+	 * @param cli_iohandler $iohandler
+	 * @param array $config
+	 */
+	private function register_configuration(cli_iohandler $iohandler, $config)
+	{
+		$iohandler->set_input('admin_name', $config['admin']['name']);
+		$iohandler->set_input('admin_pass1', $config['admin']['password']);
+		$iohandler->set_input('admin_pass2', $config['admin']['password']);
+		$iohandler->set_input('board_email', $config['admin']['email']);
+		$iohandler->set_input('submit_admin', 'submit');
+
+		$iohandler->set_input('default_lang', $config['board']['lang']);
+		$iohandler->set_input('board_name', $config['board']['name']);
+		$iohandler->set_input('board_description', $config['board']['description']);
+		$iohandler->set_input('submit_board', 'submit');
+
+		$iohandler->set_input('dbms', $config['database']['dbms']);
+		$iohandler->set_input('dbhost', $config['database']['dbhost']);
+		$iohandler->set_input('dbport', $config['database']['dbport']);
+		$iohandler->set_input('dbuser', $config['database']['dbuser']);
+		$iohandler->set_input('dbpasswd', $config['database']['dbpasswd']);
+		$iohandler->set_input('dbname', $config['database']['dbname']);
+		$iohandler->set_input('table_prefix', $config['database']['table_prefix']);
+		$iohandler->set_input('submit_database', 'submit');
+
+		$iohandler->set_input('email_enable', $config['email']['enabled']);
+		$iohandler->set_input('smtp_delivery', $config['email']['smtp_delivery']);
+		$iohandler->set_input('smtp_host', $config['email']['smtp_host']);
+		$iohandler->set_input('smtp_port', $config['email']['smtp_port']);
+		$iohandler->set_input('smtp_auth', $config['email']['smtp_auth']);
+		$iohandler->set_input('smtp_user', $config['email']['smtp_user']);
+		$iohandler->set_input('smtp_pass', $config['email']['smtp_pass']);
+		$iohandler->set_input('submit_email', 'submit');
+
+		$iohandler->set_input('cookie_secure', $config['server']['cookie_secure']);
+		$iohandler->set_input('server_protocol', $config['server']['server_protocol']);
+		$iohandler->set_input('force_server_vars', $config['server']['force_server_vars']);
+		$iohandler->set_input('server_name', $config['server']['server_name']);
+		$iohandler->set_input('server_port', $config['server']['server_port']);
+		$iohandler->set_input('script_path', $config['server']['script_path']);
+		$iohandler->set_input('submit_server', 'submit');
+
+		$iohandler->set_input('install-extensions', $config['extensions']);
+	}
+}

phpbb/install/console/command/update/config/show.php

@@ -0,0 +1,123 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\update\config;
+
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\updater_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class show extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 */
+	public function __construct(language $language, factory $factory)
+	{
+		$this->iohandler_factory = $factory;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('update:config:show')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_SHOW_CONFIG'))
+		;
+	}
+
+	/**
+	 * Show the validated configuration
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', $config_file));
+
+			return;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return;
+		}
+
+		$processor = new Processor();
+		$configuration = new updater_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return;
+		}
+
+		$style->block(Yaml::dump(array('updater' => $config), 10, 4, true, false));
+	}
+}

phpbb/install/console/command/update/config/validate.php

@@ -0,0 +1,124 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\update\config;
+
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\updater_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class validate extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 */
+	public function __construct(language $language, factory $factory)
+	{
+		$this->iohandler_factory = $factory;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('update:config:validate')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_VALIDATE_CONFIG'))
+		;
+	}
+
+	/**
+	 * Validate the configuration file
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', array($config_file)));
+
+			return 1;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return 1;
+		}
+
+		$processor = new Processor();
+		$configuration = new updater_configuration();
+
+		try
+		{
+			$processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return 1;
+		}
+
+		$iohandler->add_success_message('CONFIGURATION_VALID');
+		return 0;
+	}
+}

phpbb/install/console/command/update/update.php

@@ -0,0 +1,182 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\update;
+
+use phpbb\install\exception\installer_exception;
+use phpbb\install\helper\install_helper;
+use phpbb\install\helper\iohandler\cli_iohandler;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer;
+use phpbb\install\updater_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class update extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var install_helper
+	 */
+	protected $install_helper;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language			$language
+	 * @param factory			$factory
+	 * @param installer			$installer
+	 * @param install_helper	$install_helper
+	 */
+	public function __construct(language $language, factory $factory, installer $installer, install_helper $install_helper)
+	{
+		$this->iohandler_factory = $factory;
+		$this->installer = $installer;
+		$this->language = $language;
+		$this->install_helper = $install_helper;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('update')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_UPDATE_BOARD'))
+		;
+	}
+
+	/**
+	 * Executes the command update.
+	 *
+	 * Update the board
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return int
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$this->installer->set_iohandler($iohandler);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!$this->install_helper->is_phpbb_installed())
+		{
+			$iohandler->add_error_message('INSTALL_PHPBB_NOT_INSTALLED');
+
+			return 1;
+		}
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', $config_file));
+
+			return 1;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message(array('INVALID_YAML_FILE', $config_file));
+
+			return 1;
+		}
+
+		$processor = new Processor();
+		$configuration = new updater_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return 1;
+		}
+
+		$this->register_configuration($iohandler, $config);
+
+		try
+		{
+			$this->installer->run();
+			return 0;
+		}
+		catch (installer_exception $e)
+		{
+			$iohandler->add_error_message($e->getMessage());
+			return 1;
+		}
+	}
+
+	/**
+	 * Register the configuration to simulate the forms.
+	 *
+	 * @param cli_iohandler $iohandler
+	 * @param array $config
+	 */
+	private function register_configuration(cli_iohandler $iohandler, $config)
+	{
+		$iohandler->set_input('update_type', $config['type']);
+		$iohandler->set_input('submit_update', 'submit');
+
+		$iohandler->set_input('compression_method', '.tar');
+		$iohandler->set_input('method', 'direct_file');
+		$iohandler->set_input('submit_update_file', 'submit');
+
+		$iohandler->set_input('submit_continue_file_update', 'submit');
+
+		$iohandler->set_input('update-extensions', $config['extensions']);
+	}
+}

phpbb/install/controller/archive_download.php

@@ -0,0 +1,93 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\exception\http_exception;
+use phpbb\install\helper\config;
+use Symfony\Component\HttpFoundation\BinaryFileResponse;
+use Symfony\Component\HttpFoundation\ResponseHeaderBag;
+
+class archive_download
+{
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config $config
+	 */
+	public function __construct(config $config)
+	{
+		$this->installer_config = $config;
+		$this->installer_config->load_config();
+	}
+
+	/**
+	 * Sends response with the merge conflict archive
+	 *
+	 * Merge conflicts always have to be resolved manually,
+	 * so we use a different archive for that.
+	 *
+	 * @return BinaryFileResponse
+	 */
+	public function conflict_archive()
+	{
+		$filename = $this->installer_config->get('update_file_conflict_archive', '');
+
+		if (empty($filename))
+		{
+			throw new http_exception(404, 'URL_NOT_FOUND');
+		}
+
+		return $this->send_response($filename);
+	}
+
+	/**
+	 * Sends response with the updated files' archive
+	 *
+	 * @return BinaryFileResponse
+	 */
+	public function update_archive()
+	{
+		$filename = $this->installer_config->get('update_file_archive', '');
+
+		if (empty($filename))
+		{
+			throw new http_exception(404, 'URL_NOT_FOUND');
+		}
+
+		return $this->send_response($filename);
+	}
+
+	/**
+	 * Generates a download response
+	 *
+	 * @param string	$filename	Path to the file to download
+	 *
+	 * @return BinaryFileResponse	Response object
+	 */
+	private function send_response($filename)
+	{
+		$response = new BinaryFileResponse($filename);
+		$response->setContentDisposition(
+			ResponseHeaderBag::DISPOSITION_ATTACHMENT,
+			basename($filename)
+		);
+
+		return $response;
+	}
+}

phpbb/install/controller/helper.php

@@ -0,0 +1,413 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\install\helper\config;
+use phpbb\install\helper\navigation\navigation_provider;
+use phpbb\language\language;
+use phpbb\language\language_file_helper;
+use phpbb\path_helper;
+use phpbb\request\request;
+use phpbb\request\request_interface;
+use phpbb\routing\router;
+use phpbb\symfony_request;
+use phpbb\template\template;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\Cookie;
+
+/**
+ * A duplicate of \phpbb\controller\helper
+ *
+ * This class is necessary because of controller\helper's legacy function calls
+ * to page_header() page_footer() functions which has unavailable dependencies.
+ */
+class helper
+{
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var bool|string
+	 */
+	protected $language_cookie;
+
+	/**
+	 * @var \phpbb\language\language_file_helper
+	 */
+	protected $lang_helper;
+
+	/**
+	 * @var \phpbb\install\helper\navigation\navigation_provider
+	 */
+	protected $navigation_provider;
+
+	/**
+	 * @var \phpbb\template\template
+	 */
+	protected $template;
+
+	/**
+	 * @var \phpbb\path_helper
+	 */
+	protected $path_helper;
+
+	/**
+	 * @var \phpbb\request\request
+	 */
+	protected $phpbb_request;
+
+	/**
+	 * @var \phpbb\symfony_request
+	 */
+	protected $request;
+
+	/**
+	 * @var \phpbb\routing\router
+	 */
+	protected $router;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_admin_path;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$config
+	 * @param language				$language
+	 * @param language_file_helper	$lang_helper
+	 * @param navigation_provider	$nav
+	 * @param template				$template
+	 * @param path_helper			$path_helper
+	 * @param request				$phpbb_request
+	 * @param symfony_request		$request
+	 * @param router				$router
+	 * @param string				$phpbb_root_path
+	 */
+	public function __construct(config $config, language $language, language_file_helper $lang_helper, navigation_provider $nav, template $template, path_helper $path_helper, request $phpbb_request, symfony_request $request, router $router, $phpbb_root_path)
+	{
+		$this->installer_config = $config;
+		$this->language = $language;
+		$this->language_cookie = false;
+		$this->lang_helper = $lang_helper;
+		$this->navigation_provider = $nav;
+		$this->template = $template;
+		$this->path_helper = $path_helper;
+		$this->phpbb_request = $phpbb_request;
+		$this->request = $request;
+		$this->router = $router;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->phpbb_admin_path = $phpbb_root_path . 'adm/';
+	}
+
+	/**
+	 * Automate setting up the page and creating the response object.
+	 *
+	 * @param string	$template_file		The template handle to render
+	 * @param string	$page_title			The title of the page to output
+	 * @param bool		$selected_language	True to enable language selector it, false otherwise
+	 * @param int		$status_code		The status code to be sent to the page header
+	 *
+	 * @return Response object containing rendered page
+	 */
+	public function render($template_file, $page_title = '', $selected_language = false, $status_code = 200)
+	{
+		$this->page_header($page_title, $selected_language);
+
+		$this->template->set_filenames(array(
+			'body'	=> $template_file,
+		));
+
+		$response = new Response($this->template->assign_display('body'), $status_code);
+
+		// Set language cookie
+		if ($this->language_cookie !== false)
+		{
+			$cookie = new Cookie('lang', $this->language_cookie, time() + 3600);
+			$response->headers->setCookie($cookie);
+
+			$this->language_cookie = false;
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Returns path from route name
+	 *
+	 * @param string	$route_name
+	 * @param array		$parameters
+	 *
+	 * @return string
+	 */
+	public function route($route_name, $parameters = array())
+	{
+		$url = $this->router->generate($route_name, $parameters);
+
+		return $url;
+	}
+
+	/**
+	 * Handles language selector form
+	 */
+	public function handle_language_select()
+	{
+		$lang = null;
+
+		// Check if language form has been submited
+		$submit = $this->phpbb_request->variable('change_lang', '');
+		if (!empty($submit))
+		{
+			$lang = $this->phpbb_request->variable('language', '');
+		}
+
+		// Retrieve language from cookie
+		$lang_cookie = $this->phpbb_request->variable('lang', '', false, request_interface::COOKIE);
+		if (empty($lang) && !empty($lang_cookie))
+		{
+			$lang = $lang_cookie;
+		}
+
+		$lang = (!empty($lang) && strpos($lang, '/') === false) ? $lang : null;
+		$this->language_cookie = $lang;
+
+		$this->render_language_select($lang);
+
+		if ($lang !== null)
+		{
+			$this->language->set_user_language($lang, true);
+			$this->installer_config->set('user_language', $lang);
+		}
+	}
+
+	/**
+	 * Process navigation data to reflect active/completed stages
+	 *
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface|null	$iohandler
+	 */
+	public function handle_navigation($iohandler = null)
+	{
+		$nav_data = $this->installer_config->get_navigation_data();
+
+		// Set active navigation stage
+		if (isset($nav_data['active']) && is_array($nav_data['active']))
+		{
+			if ($iohandler !== null)
+			{
+				$iohandler->set_active_stage_menu($nav_data['active']);
+			}
+
+			$this->navigation_provider->set_nav_property($nav_data['active'], array(
+				'selected'	=> true,
+				'completed'	=> false,
+			));
+		}
+
+		// Set finished navigation stages
+		if (isset($nav_data['finished']) && is_array($nav_data['finished']))
+		{
+			foreach ($nav_data['finished'] as $finished_stage)
+			{
+				if ($iohandler !== null)
+				{
+					$iohandler->set_finished_stage_menu($finished_stage);
+				}
+
+				$this->navigation_provider->set_nav_property($finished_stage, array(
+					'selected'	=> false,
+					'completed'	=> true,
+				));
+			}
+		}
+	}
+
+	/**
+	 * Set default template variables
+	 *
+	 * @param string	$page_title			Title of the page
+	 * @param bool		$selected_language	True to enable language selector it, false otherwise
+	 */
+	protected function page_header($page_title, $selected_language = false)
+	{
+		// Path to templates
+		$paths = array($this->phpbb_root_path . 'install/update/new/adm/', $this->phpbb_admin_path);
+		$paths = array_filter($paths, 'is_dir');
+		$path = array_shift($paths);
+		$path = substr($path, strlen($this->phpbb_root_path));
+
+		$this->template->assign_vars(array(
+			'L_CHANGE'				=> $this->language->lang('CHANGE'),
+			'L_COLON'				=> $this->language->lang('COLON'),
+			'L_INSTALL_PANEL'		=> $this->language->lang('INSTALL_PANEL'),
+			'L_SELECT_LANG'			=> $this->language->lang('SELECT_LANG'),
+			'L_SKIP'				=> $this->language->lang('SKIP'),
+			'PAGE_TITLE'			=> $this->language->lang($page_title),
+			'T_IMAGE_PATH'			=> $this->path_helper->get_web_root_path() . $path . 'images',
+			'T_JQUERY_LINK'			=> $this->path_helper->get_web_root_path() . $path . '../assets/javascript/jquery.min.js',
+			'T_TEMPLATE_PATH'		=> $this->path_helper->get_web_root_path() . $path . 'style',
+			'T_ASSETS_PATH'			=> $this->path_helper->get_web_root_path() . $path . '../assets',
+
+			'S_CONTENT_DIRECTION' 	=> $this->language->lang('DIRECTION'),
+			'S_CONTENT_FLOW_BEGIN'	=> ($this->language->lang('DIRECTION') === 'ltr') ? 'left' : 'right',
+			'S_CONTENT_FLOW_END'	=> ($this->language->lang('DIRECTION') === 'ltr') ? 'right' : 'left',
+			'S_CONTENT_ENCODING' 	=> 'UTF-8',
+			'S_LANG_SELECT'			=> $selected_language,
+
+			'S_USER_LANG'			=> $this->language->lang('USER_LANG'),
+		));
+
+		$this->render_navigation();
+	}
+
+	/**
+	 * Render navigation
+	 */
+	protected function render_navigation()
+	{
+		// Get navigation items
+		$nav_array = $this->navigation_provider->get();
+		$nav_array = $this->sort_navigation_level($nav_array);
+
+		$active_main_menu = $this->get_active_main_menu($nav_array);
+
+		// Pass navigation to template
+		foreach ($nav_array as $key => $entry)
+		{
+			$this->template->assign_block_vars('t_block1', array(
+				'L_TITLE' => $this->language->lang($entry['label']),
+				'S_SELECTED' => ($active_main_menu === $key),
+				'U_TITLE' => $this->route($entry['route']),
+			));
+
+			if (is_array($entry[0]) && $active_main_menu === $key)
+			{
+				$entry[0] = $this->sort_navigation_level($entry[0]);
+
+				foreach ($entry[0] as $name => $sub_entry)
+				{
+					if (isset($sub_entry['stage']) && $sub_entry['stage'] === true)
+					{
+						$this->template->assign_block_vars('l_block2', array(
+							'L_TITLE' => $this->language->lang($sub_entry['label']),
+							'S_SELECTED' => (isset($sub_entry['selected']) && $sub_entry['selected'] === true),
+							'S_COMPLETE' => (isset($sub_entry['completed']) && $sub_entry['completed'] === true),
+							'STAGE_NAME' => $name,
+						));
+					}
+					else
+					{
+						$this->template->assign_block_vars('l_block1', array(
+							'L_TITLE' => $this->language->lang($sub_entry['label']),
+							'S_SELECTED' => (isset($sub_entry['route']) && $sub_entry['route'] === $this->request->get('_route')),
+							'U_TITLE' => $this->route($sub_entry['route']),
+						));
+					}
+				}
+			}
+		}
+	}
+
+	/**
+	 * Render language select form
+	 *
+	 * @param string	$selected_language
+	 */
+	protected function render_language_select($selected_language = null)
+	{
+		$langs = $this->lang_helper->get_available_languages();
+		foreach ($langs as $lang)
+		{
+			$this->template->assign_block_vars('language_select_item', array(
+				'VALUE' => $lang['iso'],
+				'NAME' => $lang['local_name'],
+				'SELECTED' => ($lang['iso'] === $selected_language),
+			));
+		}
+	}
+
+	/**
+	 * Returns the name of the active main menu item
+	 *
+	 * @param array	$nav_array
+	 *
+	 * @return string|bool	Returns the name of the active main menu element, if the element not found, returns false
+	 */
+	protected function get_active_main_menu($nav_array)
+	{
+		$active_route = $this->request->get('_route');
+
+		foreach ($nav_array as $nav_name => $nav_options)
+		{
+			$current_menu = $nav_name;
+
+			if (isset($nav_options['route']) && $nav_options['route'] === $active_route)
+			{
+				return $nav_name;
+			}
+
+			if (is_array($nav_options[0]))
+			{
+				foreach ($nav_options[0] as $sub_menus)
+				{
+					if (isset($sub_menus['route']) && $sub_menus['route'] === $active_route)
+					{
+						return $current_menu;
+					}
+				}
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Sorts the top level of navigation array
+	 *
+	 * @param array	$nav_array	Navigation array
+	 *
+	 * @return array
+	 */
+	protected function sort_navigation_level($nav_array)
+	{
+		$sorted = array();
+		foreach ($nav_array as $key => $nav)
+		{
+			$order = (isset($nav['order'])) ? $nav['order'] : 0;
+			$sorted[$order][$key] = $nav;
+		}
+
+		// Linearization of navigation array
+		$nav_array = array();
+		ksort($sorted);
+		foreach ($sorted as $nav)
+		{
+			$nav_array = array_merge($nav_array, $nav);
+		}
+
+		return $nav_array;
+	}
+}

phpbb/install/controller/install.php

@@ -0,0 +1,172 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\exception\http_exception;
+use phpbb\install\helper\install_helper;
+use phpbb\install\helper\navigation\navigation_provider;
+use Symfony\Component\HttpFoundation\StreamedResponse;
+use Symfony\Component\HttpFoundation\Response;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\template\template;
+use phpbb\request\request_interface;
+use phpbb\install\installer;
+use phpbb\language\language;
+
+/**
+ * Controller for installing phpBB
+ */
+class install
+{
+	/**
+	 * @var helper
+	 */
+	protected $controller_helper;
+
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var navigation_provider
+	 */
+	protected $menu_provider;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var template
+	 */
+	protected $template;
+
+	/**
+	 * @var request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var install_helper
+	 */
+	protected $install_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper 				$helper
+	 * @param factory 				$factory
+	 * @param navigation_provider	$nav_provider
+	 * @param language				$language
+	 * @param template				$template
+	 * @param request_interface		$request
+	 * @param installer				$installer
+	 * @param install_helper		$install_helper
+	 */
+	public function __construct(helper $helper, factory $factory, navigation_provider $nav_provider, language $language, template $template, request_interface $request, installer $installer, install_helper $install_helper)
+	{
+		$this->controller_helper	= $helper;
+		$this->iohandler_factory	= $factory;
+		$this->menu_provider		= $nav_provider;
+		$this->language				= $language;
+		$this->template				= $template;
+		$this->request				= $request;
+		$this->installer			= $installer;
+		$this->install_helper		= $install_helper;
+	}
+
+	/**
+	 * Controller logic
+	 *
+	 * @return Response|StreamedResponse
+	 *
+	 * @throws http_exception When phpBB is already installed
+	 */
+	public function handle()
+	{
+		if ($this->install_helper->is_phpbb_installed())
+		{
+			throw new http_exception(403, 'INSTALL_PHPBB_INSTALLED');
+		}
+
+		$this->template->assign_vars(array(
+			'U_ACTION' => $this->controller_helper->route('phpbb_installer_install'),
+		));
+
+		// Set up input-output handler
+		if ($this->request->is_ajax())
+		{
+			$this->iohandler_factory->set_environment('ajax');
+		}
+		else
+		{
+			$this->iohandler_factory->set_environment('nojs');
+		}
+
+		// Set the appropriate input-output handler
+		$this->installer->set_iohandler($this->iohandler_factory->get());
+		$this->controller_helper->handle_language_select();
+
+		if ($this->request->is_ajax())
+		{
+			$installer = $this->installer;
+			$response = new StreamedResponse();
+			$response->setCallback(function() use ($installer) {
+				$installer->run();
+			});
+
+			// Try to bypass any server output buffers
+			$response->headers->set('X-Accel-Buffering', 'no');
+
+			return $response;
+		}
+		else
+		{
+			// Determine whether the installation was started or not
+			if (true)
+			{
+				// Set active stage
+				$this->menu_provider->set_nav_property(
+					array('install', 0, 'introduction'),
+					array(
+						'selected'	=> true,
+						'completed'	=> false,
+					)
+				);
+
+				// If not, let's render the welcome page
+				$this->template->assign_vars(array(
+					'SHOW_INSTALL_START_FORM'	=> true,
+					'TITLE'						=> $this->language->lang('INSTALL_INTRO'),
+					'CONTENT'					=> $this->language->lang('INSTALL_INTRO_BODY'),
+				));
+
+				/** @var \phpbb\install\helper\iohandler\iohandler_interface $iohandler */
+				$iohandler = $this->iohandler_factory->get();
+				$this->controller_helper->handle_navigation($iohandler);
+
+				return $this->controller_helper->render('installer_install.html', 'INSTALL', true);
+			}
+
+			// @todo: implement no js controller logic
+		}
+	}
+}

phpbb/install/controller/installer_index.php

@@ -0,0 +1,81 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+class installer_index
+{
+	/**
+	 * @var helper
+	 */
+	protected $helper;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var \phpbb\template\template
+	 */
+	protected $template;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper 					$helper
+	 * @param \phpbb\language\language	$language
+	 * @param \phpbb\template\template	$template
+	 * @param string					$phpbb_root_path
+	 */
+	public function __construct(helper $helper, \phpbb\language\language $language, \phpbb\template\template $template, $phpbb_root_path)
+	{
+		$this->helper = $helper;
+		$this->language = $language;
+		$this->template = $template;
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	public function handle($mode)
+	{
+		$this->helper->handle_language_select();
+
+		switch ($mode)
+		{
+			case "intro":
+				$title = $this->language->lang('INTRODUCTION_TITLE');
+				$body = $this->language->lang('INTRODUCTION_BODY');
+			break;
+			case "support":
+				$title = $this->language->lang('SUPPORT_TITLE');
+				$body = $this->language->lang('SUPPORT_BODY');
+			break;
+			case "license":
+				$title = $this->language->lang('LICENSE_TITLE');
+				$body = implode("<br/>\n", file($this->phpbb_root_path . 'docs/LICENSE.txt'));
+			break;
+		}
+
+		$this->template->assign_vars(array(
+			'TITLE'	=> $title,
+			'BODY'	=> $body,
+		));
+
+		return $this->helper->render('installer_main.html', $title, true);
+	}
+}

phpbb/install/controller/timeout_check.php

@@ -0,0 +1,80 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use Symfony\Component\HttpFoundation\JsonResponse;
+
+class timeout_check
+{
+	/**
+	 * @var helper
+	 */
+	protected $helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper	$helper
+	 * @param string	$phpbb_root_path
+	 */
+	public function __construct(helper $helper, $phpbb_root_path)
+	{
+		$this->helper = $helper;
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	/**
+	 * Controller for querying installer status
+	 */
+	public function status()
+	{
+		$lock_file = $this->phpbb_root_path . 'store/io_lock.lock';
+		$response = new JsonResponse();
+
+		if (!file_exists($lock_file))
+		{
+			$response->setData(array(
+				'status' => 'fail',
+			));
+		}
+		else
+		{
+			$fp = @fopen($lock_file, 'r');
+
+			if ($fp && flock($fp, LOCK_EX | LOCK_NB))
+			{
+				$status = (filesize($lock_file) >= 2 && fread($fp, 2) === 'ok') ? 'continue' : 'fail';
+
+				$response->setData(array(
+					'status' => $status,
+				));
+				flock($fp, LOCK_UN);
+				fclose($fp);
+			}
+			else
+			{
+				$response->setData(array(
+					'status' => 'running',
+				));
+			}
+		}
+
+		return $response;
+	}
+}

phpbb/install/controller/update.php

@@ -0,0 +1,166 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\exception\http_exception;
+use phpbb\install\helper\install_helper;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\helper\navigation\navigation_provider;
+use phpbb\install\installer;
+use phpbb\language\language;
+use phpbb\request\request_interface;
+use phpbb\template\template;
+use Symfony\Component\HttpFoundation\StreamedResponse;
+
+/**
+ * Updater controller
+ */
+class update
+{
+	/**
+	 * @var helper
+	 */
+	protected $controller_helper;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var install_helper
+	 */
+	protected $install_helper;
+
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var navigation_provider
+	 */
+	protected $menu_provider;
+
+	/**
+	 * @var request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var template
+	 */
+	protected $template;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper				$controller_helper
+	 * @param installer				$installer
+	 * @param install_helper		$install_helper
+	 * @param factory				$iohandler
+	 * @param language				$language
+	 * @param navigation_provider	$menu_provider
+	 * @param request_interface		$request
+	 * @param template				$template
+	 */
+	public function __construct(helper $controller_helper, installer $installer, install_helper $install_helper, factory $iohandler, language $language, navigation_provider $menu_provider, request_interface $request, template $template)
+	{
+		$this->controller_helper	= $controller_helper;
+		$this->installer			= $installer;
+		$this->install_helper		= $install_helper;
+		$this->iohandler_factory	= $iohandler;
+		$this->language				= $language;
+		$this->menu_provider		= $menu_provider;
+		$this->request				= $request;
+		$this->template				= $template;
+	}
+
+	/**
+	 * Controller entry point
+	 *
+	 * @return Response|StreamedResponse
+	 *
+	 * @throws http_exception When phpBB is not installed
+	 */
+	public function handle()
+	{
+		if (!$this->install_helper->is_phpbb_installed())
+		{
+			throw new http_exception(403, 'INSTALL_PHPBB_NOT_INSTALLED');
+		}
+
+		$this->template->assign_vars(array(
+			'U_ACTION' => $this->controller_helper->route('phpbb_installer_update'),
+		));
+
+		// Set up input-output handler
+		if ($this->request->is_ajax())
+		{
+			$this->iohandler_factory->set_environment('ajax');
+		}
+		else
+		{
+			$this->iohandler_factory->set_environment('nojs');
+		}
+
+		// Set the appropriate input-output handler
+		$this->installer->set_iohandler($this->iohandler_factory->get());
+		$this->controller_helper->handle_language_select();
+
+		// Render the intro page
+		if ($this->request->is_ajax())
+		{
+			$installer = $this->installer;
+			$response = new StreamedResponse();
+			$response->setCallback(function() use ($installer) {
+				$installer->run();
+			});
+
+			// Try to bypass any server output buffers
+			$response->headers->set('X-Accel-Buffering', 'no');
+			$response->headers->set('Content-type', 'application/json');
+
+			return $response;
+		}
+		else
+		{
+			// Set active stage
+			$this->menu_provider->set_nav_property(
+				array('update', 0, 'introduction'),
+				array(
+					'selected'	=> true,
+					'completed'	=> false,
+				)
+			);
+
+			$this->template->assign_vars(array(
+				'SHOW_INSTALL_START_FORM'	=> true,
+				'TITLE'						=> $this->language->lang('UPDATE_INSTALLATION'),
+				'CONTENT'					=> $this->language->lang('UPDATE_INSTALLATION_EXPLAIN'),
+			));
+
+			/** @var \phpbb\install\helper\iohandler\iohandler_interface $iohandler */
+			$iohandler = $this->iohandler_factory->get();
+			$this->controller_helper->handle_navigation($iohandler);
+
+			return $this->controller_helper->render('installer_update.html', 'UPDATE_INSTALLATION', true);
+		}
+	}
+}

phpbb/install/event/kernel_exception_subscriber.php

@@ -0,0 +1,126 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\event;
+
+use phpbb\exception\exception_interface;
+use phpbb\install\controller\helper;
+use phpbb\language\language;
+use phpbb\template\template;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
+use Symfony\Component\HttpFoundation\JsonResponse;
+
+/**
+ * Exception handler for the installer
+ */
+class kernel_exception_subscriber implements EventSubscriberInterface
+{
+	/**
+	 * @var helper
+	 */
+	protected $controller_helper;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var template
+	 */
+	protected $template;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper	$controller_helper
+	 * @param language	$language
+	 * @param template	$template
+	 */
+	public function __construct(helper $controller_helper, language $language, template $template)
+	{
+		$this->controller_helper	= $controller_helper;
+		$this->language				= $language;
+		$this->template				= $template;
+	}
+
+	/**
+	 * This listener is run when the KernelEvents::EXCEPTION event is triggered
+	 *
+	 * @param GetResponseForExceptionEvent	$event
+	 */
+	public function on_kernel_exception(GetResponseForExceptionEvent $event)
+	{
+		$exception = $event->getException();
+		$message = $exception->getMessage();
+
+		if ($exception instanceof exception_interface)
+		{
+			$message = $this->language->lang_array($message, $exception->get_parameters());
+		}
+
+		if (!$event->getRequest()->isXmlHttpRequest())
+		{
+			$this->template->assign_vars(array(
+				'TITLE'	=> $this->language->lang('INFORMATION'),
+				'BODY'	=> $message,
+			));
+
+			$response = $this->controller_helper->render(
+				'installer_main.html',
+				$this->language->lang('INFORMATION'),
+				false,
+				500
+			);
+		}
+		else
+		{
+			$data = array();
+
+			if (!empty($message))
+			{
+				$data['message'] = $message;
+			}
+
+			if (defined('DEBUG'))
+			{
+				$data['trace'] = $exception->getTrace();
+			}
+
+			$response = new JsonResponse($data, 500);
+		}
+
+		if ($exception instanceof HttpExceptionInterface)
+		{
+			$response->setStatusCode($exception->getStatusCode());
+			$response->headers->add($exception->getHeaders());
+		}
+
+		$event->setResponse($response);
+	}
+
+	/**
+	 * Returns an array of events the object is subscribed to
+	 *
+	 * @return array	Array of events the object is subscribed to
+	 */
+	static public function getSubscribedEvents()
+	{
+		return array(
+			KernelEvents::EXCEPTION		=> 'on_kernel_exception',
+		);
+	}
+}

phpbb/install/exception/cannot_build_container_exception.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * Thrown when the container cannot be built
+ */
+class cannot_build_container_exception extends installer_exception
+{
+
+}

phpbb/install/exception/file_updater_failure_exception.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * Thrown when the file updater fails
+ */
+class file_updater_failure_exception extends installer_exception
+{
+
+}

phpbb/install/exception/installer_config_not_writable_exception.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * Thrown when installer config is not writable to disk
+ */
+class installer_config_not_writable_exception extends installer_exception
+{
+
+}

phpbb/install/exception/installer_exception.php

@@ -0,0 +1,24 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+use phpbb\exception\runtime_exception;
+
+/**
+ * Installer's base exception
+ */
+class installer_exception extends runtime_exception
+{
+
+}

phpbb/install/exception/invalid_dbms_exception.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * Thrown when an unavailable DBMS has been selected
+ */
+class invalid_dbms_exception extends installer_exception
+{
+
+}

phpbb/install/exception/jump_to_restart_point_exception.php

@@ -0,0 +1,44 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+class jump_to_restart_point_exception extends installer_exception
+{
+	/**
+	 * @var string
+	 */
+	protected $restart_point_name;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string $restart_point_name
+	 */
+	public function __construct($restart_point_name)
+	{
+		$this->restart_point_name = $restart_point_name;
+
+		parent::__construct();
+	}
+
+	/**
+	 * Returns the restart point's name
+	 *
+	 * @return string
+	 */
+	public function get_restart_point_name()
+	{
+		return $this->restart_point_name;
+	}
+}

phpbb/install/exception/resource_limit_reached_exception.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * Thrown when the installer is out of memory or time
+ */
+class resource_limit_reached_exception extends installer_exception
+{
+
+}

phpbb/install/exception/user_interaction_required_exception.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\exception;
+
+/**
+ * This exception should be thrown when user interaction is inevitable
+ *
+ * Note: Please note that the output should already be setup for the user
+ * 		 when you use throw this exception
+ */
+class user_interaction_required_exception extends installer_exception
+{
+
+}

phpbb/install/helper/config.php

@@ -0,0 +1,452 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper;
+
+use phpbb\install\exception\installer_config_not_writable_exception;
+
+/**
+ * Stores common settings and installation status
+ */
+class config
+{
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * Array which contains config settings for the installer
+	 *
+	 * The array will also store all the user input, as well as any
+	 * data that is passed to other tasks by a task.
+	 *
+	 * @var array
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var string
+	 */
+	protected $install_config_file;
+
+	/**
+	 * @var \bantu\IniGetWrapper\IniGetWrapper
+	 */
+	protected $php_ini;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Array containing progress information
+	 *
+	 * @var array
+	 */
+	protected $progress_data;
+
+	/**
+	 * Array containing system information
+	 *
+	 * The array contains run time and memory limitations.
+	 *
+	 * @var array
+	 */
+	protected $system_data;
+
+	/**
+	 * Array containing navigation bar information
+	 *
+	 * @var array
+	 */
+	protected $navigation_data;
+
+	/**
+	 * Flag indicating that config file should be cleaned up
+	 *
+	 * @var bool
+	 */
+	protected $do_clean_up;
+
+	/**
+	 * Constructor
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem, \bantu\IniGetWrapper\IniGetWrapper $php_ini, $phpbb_root_path)
+	{
+		$this->filesystem		= $filesystem;
+		$this->php_ini			= $php_ini;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->do_clean_up		= false;
+
+		// Set up data arrays
+		$this->navigation_data	= array();
+		$this->installer_config	= array();
+		$this->system_data		= array();
+		$this->progress_data	= array(
+			'last_task_module_name'		=> '', // Stores the service name of the latest finished module
+			'last_task_module_index'	=> 0, // Stores the index of the latest finished module
+			'last_task_index'			=> 0, // Stores the index of the latest finished task
+			'max_task_progress'			=> 0,
+			'current_task_progress'		=> 0,
+			'_restart_points'			=> array(),
+			'use_restart_point'			=> false,
+		);
+
+		$this->install_config_file = $this->phpbb_root_path . 'store/install_config.php';
+
+		$this->setup_system_data();
+	}
+
+	/**
+	 * Returns data for a specified parameter
+	 *
+	 * @param	string	$param_name	Name of the parameter to return
+	 * @param	mixed	$default	Default value to return when the specified data
+	 * 								does not exist.
+	 *
+	 * @return 	mixed	value of the specified parameter or the default value if the data
+	 * 					cannot be recovered.
+	 */
+	public function get($param_name, $default = false)
+	{
+		return (isset($this->installer_config[$param_name])) ? $this->installer_config[$param_name] : $default;
+	}
+
+	/**
+	 * Sets a parameter in installer_config
+	 *
+	 * @param	string	$param_name	Name of the parameter
+	 * @param	mixed	$value		Values to set the parameter
+	 */
+	public function set($param_name, $value)
+	{
+		$this->installer_config = array_merge($this->installer_config, array(
+			$param_name => $value,
+		));
+	}
+
+	/**
+	 * Returns system parameter
+	 *
+	 * @param string	$param_name	Name of the parameter
+	 *
+	 * @return mixed	Returns system parameter if it is defined, false otherwise
+	 */
+	public function system_get($param_name)
+	{
+		return (isset($this->system_data[$param_name])) ? $this->system_data[$param_name] : false;
+	}
+
+	/**
+	 * Returns remaining time until the run time limit
+	 *
+	 * @return int	Remaining time until the run time limit in seconds
+	 */
+	public function get_time_remaining()
+	{
+		if ($this->system_data['max_execution_time'] <= 0)
+		{
+			return PHP_INT_MAX;
+		}
+
+		return ($this->system_data['start_time'] + $this->system_data['max_execution_time']) - microtime(true);
+	}
+
+	/**
+	 * Returns remaining memory available for PHP
+	 *
+	 * @return int	Remaining memory until reaching the limit
+	 */
+	public function get_memory_remaining()
+	{
+		if ($this->system_data['memory_limit'] <= 0)
+		{
+			return 1;
+		}
+
+		if (function_exists('memory_get_usage'))
+		{
+			return ($this->system_data['memory_limit'] - memory_get_usage());
+		}
+
+		// If we cannot get the information then just return a positive number (and cross fingers)
+		return 1;
+	}
+
+	/**
+	 * Saves the latest executed task
+	 *
+	 * @param int	$task_service_index	Index of the installer task service in the module
+	 */
+	public function set_finished_task($task_service_index)
+	{
+		$this->progress_data['last_task_index']	= $task_service_index;
+	}
+
+	/**
+	 * Set active module
+	 *
+	 * @param string	$module_service_name	Name of the installer module service
+	 * @param int		$module_service_index	Index of the installer module service
+	 */
+	public function set_active_module($module_service_name, $module_service_index)
+	{
+		$this->progress_data['last_task_module_name']	= $module_service_name;
+		$this->progress_data['last_task_module_index']	= $module_service_index;
+	}
+
+	/**
+	 * Getter for progress data
+	 *
+	 * @return array
+	 */
+	public function get_progress_data()
+	{
+		return $this->progress_data;
+	}
+
+	/**
+	 * Recovers install configuration from file
+	 */
+	public function load_config()
+	{
+		if (!$this->filesystem->exists($this->install_config_file))
+		{
+			return;
+		}
+
+		$file_content = @file_get_contents($this->install_config_file);
+		$serialized_data = trim(substr($file_content, 8));
+
+		$installer_config = array();
+		$progress_data = array();
+		$navigation_data = array();
+
+		if (!empty($serialized_data))
+		{
+			$unserialized_data = json_decode($serialized_data, true);
+
+			$installer_config = (is_array($unserialized_data['installer_config'])) ? $unserialized_data['installer_config'] : array();
+			$progress_data = (is_array($unserialized_data['progress_data'])) ? $unserialized_data['progress_data'] : array();
+			$navigation_data = (is_array($unserialized_data['navigation_data'])) ? $unserialized_data['navigation_data'] : array();
+		}
+
+		$this->installer_config = array_merge($this->installer_config, $installer_config);
+		$this->progress_data = array_merge($this->progress_data, $progress_data);
+		$this->navigation_data = array_merge($this->navigation_data, $navigation_data);
+	}
+
+	/**
+	 * Creates a progress restart point
+	 *
+	 * Restart points can be used to repeat certain tasks periodically.
+	 * You need to call this method from the first task you want to repeat.
+	 *
+	 * @param string	$name	Name of the restart point
+	 */
+	public function create_progress_restart_point($name)
+	{
+		$tmp_progress_data = $this->progress_data;
+		unset($tmp_progress_data['_restart_points']);
+
+		$this->progress_data['_restart_points'][$name] = $tmp_progress_data;
+	}
+
+	/**
+	 * Set restart point to continue from
+	 *
+	 * @param string	$name	Name of the restart point
+	 *
+	 * @return bool	Returns false if the restart point name does not exist, otherwise true
+	 */
+	public function jump_to_restart_point($name)
+	{
+		if (!isset($this->progress_data['_restart_points'][$name]) || empty($this->progress_data['_restart_points'][$name]))
+		{
+			return false;
+		}
+
+		foreach ($this->progress_data['_restart_points'][$name] as $key => $value)
+		{
+			$this->progress_data[$key] = $value;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Returns whether a restart point with a given name exists or not
+	 *
+	 * @param string	$name Name of the restart point
+	 *
+	 * @return bool
+	 */
+	public function has_restart_point($name)
+	{
+		return isset($this->progress_data['_restart_points'][$name]);
+	}
+
+	/**
+	 * Dumps install configuration to disk
+	 */
+	public function save_config()
+	{
+		if ($this->do_clean_up)
+		{
+			@unlink($this->install_config_file);
+			return;
+		}
+
+		// Create array to save
+		$save_array = array(
+			'installer_config'	=> $this->installer_config,
+			'progress_data'		=> $this->progress_data,
+			'navigation_data'	=> $this->navigation_data,
+		);
+
+		// Create file content
+		$file_content = '<?php // ';
+		$file_content .= json_encode($save_array);
+		$file_content .= "\n";
+
+		// Dump file_content to disk
+		$fp = @fopen($this->install_config_file, 'w');
+		if (!$fp)
+		{
+			throw new installer_config_not_writable_exception();
+		}
+
+		fwrite($fp, $file_content);
+		fclose($fp);
+		// Enforce 0600 permission for install config
+		$this->filesystem->chmod([$this->install_config_file], 0600);
+	}
+
+	/**
+	 * Increments the task progress
+	 *
+	 * @param int	$increment_by	The amount to increment by
+	 */
+	public function increment_current_task_progress($increment_by = 1)
+	{
+		$this->progress_data['current_task_progress'] += $increment_by;
+
+		if ($this->progress_data['current_task_progress'] > $this->progress_data['max_task_progress'])
+		{
+			$this->progress_data['current_task_progress'] = $this->progress_data['max_task_progress'];
+		}
+	}
+
+	/**
+	 * Sets the task progress to a specific number
+	 *
+	 * @param int	$task_progress	The task progress number to be set
+	 */
+	public function set_current_task_progress($task_progress)
+	{
+		$this->progress_data['current_task_progress'] = $task_progress;
+	}
+
+	/**
+	 * Sets the number of tasks belonging to the installer in the current mode.
+	 *
+	 * @param int	$task_progress_count	Number of tasks
+	 */
+	public function set_task_progress_count($task_progress_count)
+	{
+		$this->progress_data['max_task_progress'] = $task_progress_count;
+	}
+
+	/**
+	 * Returns the number of the current task being executed
+	 *
+	 * @return int
+	 */
+	public function get_current_task_progress()
+	{
+		return $this->progress_data['current_task_progress'];
+	}
+
+	/**
+	 * Returns the number of tasks belonging to the installer in the current mode.
+	 *
+	 * @return int
+	 */
+	public function get_task_progress_count()
+	{
+		return $this->progress_data['max_task_progress'];
+	}
+
+	/**
+	 * Marks stage as completed in the navigation bar
+	 *
+	 * @param array	$nav_path	Array to the navigation elem
+	 */
+	public function set_finished_navigation_stage($nav_path)
+	{
+		if (isset($this->navigation_data['finished']) && in_array($nav_path, $this->navigation_data['finished']))
+		{
+			return;
+		}
+
+		$this->navigation_data['finished'][] = $nav_path;
+	}
+
+	/**
+	 * Marks stage as active in the navigation bar
+	 *
+	 * @param array	$nav_path	Array to the navigation elem
+	 */
+	public function set_active_navigation_stage($nav_path)
+	{
+		$this->navigation_data['active'] = $nav_path;
+	}
+
+	/**
+	 * Returns navigation data
+	 *
+	 * @return array
+	 */
+	public function get_navigation_data()
+	{
+		return $this->navigation_data;
+	}
+
+	/**
+	 * Removes install config file
+	 */
+	public function clean_up_config_file()
+	{
+		$this->do_clean_up = true;
+		@unlink($this->install_config_file);
+	}
+
+	/**
+	 * Filling up system_data array
+	 */
+	protected function setup_system_data()
+	{
+		// Query maximum runtime from php.ini
+		$execution_time = $this->php_ini->getNumeric('max_execution_time');
+		$execution_time = min(15, $execution_time / 2);
+		$this->system_data['max_execution_time'] = $execution_time;
+
+		// Set start time
+		$this->system_data['start_time'] = microtime(true);
+
+		// Get memory limit
+		$this->system_data['memory_limit'] = $this->php_ini->getBytes('memory_limit');
+	}
+}

phpbb/install/helper/container_factory.php

@@ -0,0 +1,191 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper;
+
+use phpbb\install\exception\cannot_build_container_exception;
+use phpbb\language\language;
+use phpbb\request\request;
+
+class container_factory
+{
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var \phpbb\request\request
+	 */
+	protected $request;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * The full phpBB container
+	 *
+	 * @var \Symfony\Component\DependencyInjection\ContainerInterface
+	 */
+	protected $container;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language 		$language			Language service
+	 * @param request		$request			Request interface
+	 * @param update_helper	$update_helper		Update helper
+	 * @param string		$phpbb_root_path	Path to phpBB's root
+	 * @param string		$php_ext			Extension of PHP files
+	 */
+	public function __construct(language $language, request $request, update_helper $update_helper, $phpbb_root_path, $php_ext)
+	{
+		$this->language			= $language;
+		$this->request			= $request;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+		$this->container		= null;
+	}
+
+	/**
+	 * Container getter
+	 *
+	 * @param null|string	$service_name	Name of the service to return
+	 *
+	 * @return \Symfony\Component\DependencyInjection\ContainerInterface|Object	phpBB's dependency injection container
+	 * 																			or the service specified in $service_name
+	 *
+	 * @throws \phpbb\install\exception\cannot_build_container_exception							When container cannot be built
+	 * @throws \Symfony\Component\DependencyInjection\Exception\InvalidArgumentException			If the service is not defined
+	 * @throws \Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException	When a circular reference is detected
+	 * @throws \Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException			When the service is not defined
+	 */
+	public function get($service_name = null)
+	{
+		// Check if container was built, if not try to build it
+		if ($this->container === null)
+		{
+			$this->build_container();
+		}
+
+		return ($service_name === null) ? $this->container : $this->container->get($service_name);
+	}
+
+	/**
+	 * Returns the specified parameter from the container
+	 *
+	 * @param string	$param_name
+	 *
+	 * @return mixed
+	 *
+	 * @throws \phpbb\install\exception\cannot_build_container_exception	When container cannot be built
+	 */
+	public function get_parameter($param_name)
+	{
+		// Check if container was built, if not try to build it
+		if ($this->container === null)
+		{
+			$this->build_container();
+		}
+
+		return $this->container->getParameter($param_name);
+	}
+
+	/**
+	 * Build dependency injection container
+	 *
+	 * @throws \phpbb\install\exception\cannot_build_container_exception	When container cannot be built
+	 */
+	protected function build_container()
+	{
+		// If the container has been already built just return.
+		// Although this should never happen
+		if ($this->container instanceof \Symfony\Component\DependencyInjection\ContainerInterface)
+		{
+			return;
+		}
+
+		// Check whether container can be built
+		// We need config.php for that so let's check if it has been set up yet
+		if (!filesize($this->phpbb_root_path . 'config.' . $this->php_ext))
+		{
+			throw new cannot_build_container_exception();
+		}
+
+		$phpbb_config_php_file = new \phpbb\config_php_file($this->phpbb_root_path, $this->php_ext);
+		$phpbb_container_builder = new \phpbb\di\container_builder($this->phpbb_root_path, $this->php_ext);
+
+		// For BC with functions that we need during install
+		global $phpbb_container, $table_prefix;
+
+		$disable_super_globals = $this->request->super_globals_disabled();
+
+		// This is needed because container_builder::get_env_parameters() uses $_SERVER
+		if ($disable_super_globals)
+		{
+			$this->request->enable_super_globals();
+		}
+
+		$other_config_path = $this->phpbb_root_path . 'install/update/new/config';
+		$config_path = (is_dir($other_config_path)) ? $other_config_path : $this->phpbb_root_path . 'config';
+
+		$this->container = $phpbb_container_builder
+			->with_environment('production')
+			->with_config($phpbb_config_php_file)
+			->with_config_path($config_path)
+			->without_compiled_container()
+			->get_container();
+
+		// Setting request is required for the compatibility globals as those are generated from
+		// this container
+		if (!$this->container->isFrozen())
+		{
+			$this->container->register('request')->setSynthetic(true);
+			$this->container->register('language')->setSynthetic(true);
+		}
+
+		$this->container->set('request', $this->request);
+		$this->container->set('language', $this->language);
+
+		$this->container->compile();
+
+		$phpbb_container = $this->container;
+		$table_prefix = $phpbb_config_php_file->get('table_prefix');
+
+		// Restore super globals to previous state
+		if ($disable_super_globals)
+		{
+			$this->request->disable_super_globals();
+		}
+
+		// Get compatibilty globals and constants
+		$this->update_helper->include_file('includes/compatibility_globals.' . $this->php_ext);
+
+		register_compatibility_globals();
+
+		$this->update_helper->include_file('includes/constants.' . $this->php_ext);
+	}
+}

phpbb/install/helper/database.php

@@ -0,0 +1,439 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper;
+
+use phpbb\install\exception\invalid_dbms_exception;
+
+/**
+ * Database related general functionality for installer
+ */
+class database
+{
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var array
+	 */
+	protected $supported_dbms = array(
+		// Note: php 5.5 alpha 2 deprecated mysql.
+		// Keep mysqli before mysql in this list.
+		'mysqli'	=> array(
+			'LABEL'			=> 'MySQL with MySQLi Extension',
+			'SCHEMA'		=> 'mysql_41',
+			'MODULE'		=> 'mysqli',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\mysqli',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> true,
+		),
+		'mysql'		=> array(
+			'LABEL'			=> 'MySQL',
+			'SCHEMA'		=> 'mysql',
+			'MODULE'		=> 'mysql',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\mysql',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> true,
+		),
+		'mssql_odbc'=>	array(
+			'LABEL'			=> 'MS SQL Server [ ODBC ]',
+			'SCHEMA'		=> 'mssql',
+			'MODULE'		=> 'odbc',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\mssql_odbc',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> true,
+		),
+		'mssqlnative'		=> array(
+			'LABEL'			=> 'MS SQL Server 2005+ [ Native ]',
+			'SCHEMA'		=> 'mssql',
+			'MODULE'		=> 'sqlsrv',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\mssqlnative',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> false,
+		),
+		'oracle'	=>	array(
+			'LABEL'			=> 'Oracle',
+			'SCHEMA'		=> 'oracle',
+			'MODULE'		=> 'oci8',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\oracle',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> false,
+		),
+		'postgres' => array(
+			'LABEL'			=> 'PostgreSQL 8.3+',
+			'SCHEMA'		=> 'postgres',
+			'MODULE'		=> 'pgsql',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\postgres',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> true,
+		),
+		'sqlite3'		=> array(
+			'LABEL'			=> 'SQLite3',
+			'SCHEMA'		=> 'sqlite',
+			'MODULE'		=> 'sqlite3',
+			'DELIM'			=> ';',
+			'DRIVER'		=> 'phpbb\db\driver\sqlite3',
+			'AVAILABLE'		=> true,
+			'2.0.x'			=> false,
+		),
+	);
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\filesystem\filesystem_interface	$filesystem			Filesystem interface
+	 * @param string									$phpbb_root_path	Path to phpBB's root
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem, $phpbb_root_path)
+	{
+		$this->filesystem		= $filesystem;
+		$this->phpbb_root_path	= $phpbb_root_path;
+	}
+
+	/**
+	 * Returns an array of available DBMS supported by phpBB
+	 *
+	 * If a DBMS is specified it will only return data for that DBMS
+	 * and will load its extension if necessary.
+	 *
+	 * @param	mixed	$dbms				name of the DBMS that's info is required or false for all DBMS info
+	 * @param	bool	$return_unavailable	set it to true if you expect unavailable but supported DBMS
+	 * 										returned as well
+	 * @param	bool	$only_20x_options	set it to true if you only want to recover 2.0.x options
+	 *
+	 * @return	array	Array of available and supported DBMS
+	 */
+	public function get_available_dbms($dbms = false, $return_unavailable = false, $only_20x_options = false)
+	{
+		$available_dbms = $this->supported_dbms;
+
+		if ($dbms)
+		{
+			if (isset($this->supported_dbms[$dbms]))
+			{
+				$available_dbms = array($dbms => $this->supported_dbms[$dbms]);
+			}
+			else
+			{
+				return array();
+			}
+		}
+
+		$any_dbms_available = false;
+		foreach ($available_dbms as $db_name => $db_array)
+		{
+			if ($only_20x_options && !$db_array['2.0.x'])
+			{
+				if ($return_unavailable)
+				{
+					$available_dbms[$db_name]['AVAILABLE'] = false;
+				}
+				else
+				{
+					unset($available_dbms[$db_name]);
+				}
+
+				continue;
+			}
+
+			$dll = $db_array['MODULE'];
+			if (!@extension_loaded($dll))
+			{
+				if ($return_unavailable)
+				{
+					$available_dbms[$db_name]['AVAILABLE'] = false;
+				}
+				else
+				{
+					unset($available_dbms[$db_name]);
+				}
+
+				continue;
+			}
+
+			$any_dbms_available = true;
+		}
+
+		if ($return_unavailable)
+		{
+			$available_dbms['ANY_DB_SUPPORT'] = $any_dbms_available;
+		}
+
+		return $available_dbms;
+	}
+
+	/**
+	 * Removes "/* style" as well as "# style" comments from $input.
+	 *
+	 * @param string $sql_query	Input string
+	 *
+	 * @return string Input string with comments removed
+	 */
+	public function remove_comments($sql_query)
+	{
+		// Remove /* */ comments (http://ostermiller.org/findcomment.html)
+		$sql_query = preg_replace('#/\*(.|[\r\n])*?\*/#', "\n", $sql_query);
+
+		// Remove # style comments
+		$sql_query = preg_replace('/\n{2,}/', "\n", preg_replace('/^#.*$/m', "\n", $sql_query));
+
+		return $sql_query;
+	}
+
+	/**
+	 * split_sql_file() will split an uploaded sql file into single sql statements.
+	 *
+	 * Note: expects trim() to have already been run on $sql.
+	 *
+	 * @param	string	$sql		SQL statements
+	 * @param	string	$delimiter	Delimiter between sql statements
+	 *
+	 * @return array Array of sql statements
+	 */
+	public function split_sql_file($sql, $delimiter)
+	{
+		$sql = str_replace("\r" , '', $sql);
+		$data = preg_split('/' . preg_quote($delimiter, '/') . '$/m', $sql);
+
+		$data = array_map('trim', $data);
+
+		// The empty case
+		$end_data = end($data);
+
+		if (empty($end_data))
+		{
+			unset($data[key($data)]);
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Validates table prefix
+	 *
+	 * @param string	$dbms			The selected dbms
+	 * @param string	$table_prefix	The table prefix to validate
+	 *
+	 * @return bool|array	true if table prefix is valid, array of errors otherwise
+	 *
+	 * @throws \phpbb\install\exception\invalid_dbms_exception When $dbms is not a valid
+	 */
+	public function validate_table_prefix($dbms, $table_prefix)
+	{
+		$errors = array();
+
+		if (!preg_match('#^[a-zA-Z][a-zA-Z0-9_]*$#', $table_prefix))
+		{
+			$errors[] = array(
+				'title' => 'INST_ERR_DB_INVALID_PREFIX',
+			);
+		}
+
+		// Do dbms specific checks
+		$dbms_info = $this->get_available_dbms($dbms);
+		switch ($dbms_info[$dbms]['SCHEMA'])
+		{
+			case 'mysql':
+			case 'mysql_41':
+				$prefix_length = 36;
+			break;
+			case 'mssql':
+				$prefix_length = 90;
+			break;
+			case 'oracle':
+				$prefix_length = 6;
+			break;
+			case 'postgres':
+				$prefix_length = 36;
+			break;
+			case 'sqlite':
+				$prefix_length = 200;
+			break;
+			default:
+				throw new invalid_dbms_exception();
+			break;
+		}
+
+		// Check the prefix length to ensure that index names are not too long
+		if (strlen($table_prefix) > $prefix_length)
+		{
+			$errors[] = array(
+				'title' => array('INST_ERR_PREFIX_TOO_LONG', $prefix_length),
+			);
+		}
+
+		return (empty($errors)) ? true : $errors;
+	}
+
+	/**
+	 * Check if the user provided database parameters are correct
+	 *
+	 * This function checks the database connection data and also checks for
+	 * any other problems that could cause an error during the installation
+	 * such as if there is any database table names conflicting.
+	 *
+	 * Note: The function assumes that $table_prefix has been already validated
+	 * with validate_table_prefix().
+	 *
+	 * @param string	$dbms			Selected database type
+	 * @param string	$dbhost			Database host address
+	 * @param int		$dbport			Database port number
+	 * @param string	$dbuser			Database username
+	 * @param string	$dbpass			Database password
+	 * @param string	$dbname			Database name
+	 * @param string	$table_prefix	Database table prefix
+	 *
+	 * @return array|bool	Returns true if test is successful, array of errors otherwise
+	 */
+	public function check_database_connection($dbms, $dbhost, $dbport, $dbuser, $dbpass, $dbname, $table_prefix)
+	{
+		$dbms_info = $this->get_available_dbms($dbms);
+		$dbms_info = $dbms_info[$dbms];
+		$errors = array();
+
+		// Instantiate it and set return on error true
+		/** @var \phpbb\db\driver\driver_interface $db */
+		$db = new $dbms_info['DRIVER'];
+		$db->sql_return_on_error(true);
+
+		// Check that we actually have a database name before going any further
+		if (!in_array($dbms_info['SCHEMA'], array('sqlite', 'oracle'), true) && $dbname === '')
+		{
+			$errors[] = array(
+				'title' => 'INST_ERR_DB_NO_NAME',
+			);
+		}
+
+		// Make sure we don't have a daft user who thinks having the SQLite database in the forum directory is a good idea
+		if ($dbms_info['SCHEMA'] === 'sqlite'
+			&& stripos($this->filesystem->realpath($dbhost), $this->filesystem->realpath($this->phpbb_root_path) === 0))
+		{
+			$errors[] = array(
+				'title' =>'INST_ERR_DB_FORUM_PATH',
+			);
+		}
+
+		// Check if SQLite database is writable
+		if ($dbms_info['SCHEMA'] === 'sqlite'
+			&& (($this->filesystem->exists($dbhost) && !$this->filesystem->is_writable($dbhost)) || !$this->filesystem->is_writable(pathinfo($dbhost, PATHINFO_DIRNAME))))
+		{
+			$errors[] = array(
+				'title' =>'INST_ERR_DB_NO_WRITABLE',
+			);
+		}
+
+		// Try to connect to db
+		if (is_array($db->sql_connect($dbhost, $dbuser, $dbpass, $dbname, $dbport, false, true)))
+		{
+			$db_error = $db->sql_error();
+			$errors[] = array(
+				'title' => 'INST_ERR_DB_CONNECT',
+				'description' => ($db_error['message']) ? utf8_convert_message($db_error['message']) : 'INST_ERR_DB_NO_ERROR',
+			);
+		}
+		else
+		{
+			// Check if there is any table name collisions
+			$temp_prefix = strtolower($table_prefix);
+			$table_ary = array(
+				$temp_prefix . 'attachments',
+				$temp_prefix . 'config',
+				$temp_prefix . 'sessions',
+				$temp_prefix . 'topics',
+				$temp_prefix . 'users',
+			);
+
+			$db_tools_factory = new \phpbb\db\tools\factory();
+			$db_tools = $db_tools_factory->get($db);
+			$tables = $db_tools->sql_list_tables();
+			$tables = array_map('strtolower', $tables);
+			$table_intersect = array_intersect($tables, $table_ary);
+
+			if (count($table_intersect))
+			{
+				$errors[] = array(
+					'title' => 'INST_ERR_PREFIX',
+				);
+			}
+
+			// Check if database version is supported
+			switch ($dbms)
+			{
+				case 'mysqli':
+					if (version_compare($db->sql_server_info(true), '4.1.3', '<'))
+					{
+						$errors[] = array(
+							'title' => 'INST_ERR_DB_NO_MYSQLI',
+						);
+					}
+				break;
+				case 'sqlite3':
+					if (version_compare($db->sql_server_info(true), '3.6.15', '<'))
+					{
+						$errors[] = array(
+							'title' => 'INST_ERR_DB_NO_SQLITE3',
+						);
+					}
+				break;
+				case 'oracle':
+					$sql = "SELECT *
+						FROM NLS_DATABASE_PARAMETERS
+						WHERE PARAMETER = 'NLS_RDBMS_VERSION'
+							OR PARAMETER = 'NLS_CHARACTERSET'";
+					$result = $db->sql_query($sql);
+
+					while ($row = $db->sql_fetchrow($result))
+					{
+						$stats[$row['parameter']] = $row['value'];
+					}
+					$db->sql_freeresult($result);
+
+					if (version_compare($stats['NLS_RDBMS_VERSION'], '9.2', '<') && $stats['NLS_CHARACTERSET'] !== 'UTF8')
+					{
+						$errors[] = array(
+							'title' => 'INST_ERR_DB_NO_ORACLE',
+						);
+					}
+				break;
+				case 'postgres':
+					$sql = "SHOW server_encoding;";
+					$result = $db->sql_query($sql);
+					$row = $db->sql_fetchrow($result);
+					$db->sql_freeresult($result);
+
+					if ($row['server_encoding'] !== 'UNICODE' && $row['server_encoding'] !== 'UTF8')
+					{
+						$errors[] = array(
+							'title' => 'INST_ERR_DB_NO_POSTGRES',
+						);
+					}
+				break;
+			}
+		}
+
+		return (empty($errors)) ? true : $errors;
+	}
+}

phpbb/install/helper/file_updater/compression_file_updater.php

@@ -0,0 +1,133 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\file_updater;
+
+use phpbb\install\helper\update_helper;
+
+/**
+ * File updater for generating archive with updated files
+ */
+class compression_file_updater implements file_updater_interface
+{
+	/**
+	 * @var \compress
+	 */
+	protected $compress;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param update_helper	$update_helper
+	 * @param string		$phpbb_root_path
+	 * @param string		$php_ext
+	 */
+	public function __construct(update_helper $update_helper, $phpbb_root_path, $php_ext)
+	{
+		$this->compress			= null;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+	}
+
+	/**
+	 * Set the compression method
+	 *
+	 * @param string	$method	Compression method's file extension
+	 *
+	 * @return string	Archive's filename
+	 */
+	public function init($method)
+	{
+		$this->update_helper->include_file('includes/functions_compress.' . $this->php_ext);
+
+		$archive_filename = 'update_archive_' . time() . '_' . uniqid();
+		$path = $this->phpbb_root_path . 'store/' . $archive_filename . '' . $method;
+
+		if ($method === '.zip')
+		{
+			$this->compress = new \compress_zip('w', $path);
+		}
+		else
+		{
+			$this->compress = new \compress_tar('w', $path, $method);
+		}
+
+		return $path;
+	}
+
+	/**
+	 * Close archive writing process
+	 */
+	public function close()
+	{
+		$this->compress->close();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function delete_file($path_to_file)
+	{
+		// We do absolutely nothing here, as this function is called when a file should be
+		// removed from the filesystem, but since this is an archive generator, it clearly
+		// cannot do that.
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function create_new_file($path_to_file_to_create, $source, $create_from_content = false)
+	{
+		if ($create_from_content)
+		{
+			$this->compress->add_data($source, $path_to_file_to_create);
+		}
+		else
+		{
+			$this->compress->add_custom_file($source, $path_to_file_to_create);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function update_file($path_to_file_to_update, $source, $create_from_content = false)
+	{
+		// Both functions are identical here
+		$this->create_new_file($path_to_file_to_update, $source, $create_from_content);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_method_name()
+	{
+		return 'compression';
+	}
+}

phpbb/install/helper/file_updater/factory.php

@@ -0,0 +1,69 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\file_updater;
+
+use phpbb\di\service_collection;
+use phpbb\install\exception\file_updater_failure_exception;
+
+/**
+ * File updater factory
+ */
+class factory
+{
+	/**
+	 * @var array
+	 */
+	protected $file_updaters;
+
+	/**
+	 * Constructor
+	 *
+	 * @param service_collection $collection	File updater service collection
+	 */
+	public function __construct(service_collection $collection)
+	{
+		foreach ($collection as $service)
+		{
+			$this->register($service);
+		}
+	}
+
+	/**
+	 * Register updater object
+	 *
+	 * @param file_updater_interface $updater	Updater object
+	 */
+	public function register(file_updater_interface $updater)
+	{
+		$name = $updater->get_method_name();
+		$this->file_updaters[$name] = $updater;
+	}
+
+	/**
+	 * Returns file updater object
+	 *
+	 * @param string $name	Name of the updater method
+	 *
+	 * @throws file_updater_failure_exception	When the specified file updater does not exist
+	 */
+	public function get($name)
+	{
+		if (!isset($this->file_updaters[$name]))
+		{
+			throw new file_updater_failure_exception();
+		}
+
+		return $this->file_updaters[$name];
+	}
+}

phpbb/install/helper/file_updater/file_updater.php

@@ -0,0 +1,202 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\file_updater;
+
+use phpbb\filesystem\exception\filesystem_exception;
+use phpbb\filesystem\filesystem;
+use phpbb\install\exception\file_updater_failure_exception;
+
+/**
+ * File updater for direct filesystem access
+ */
+class file_updater implements file_updater_interface
+{
+	/**
+	 * @var filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param filesystem	$filesystem
+	 * @param string		$phpbb_root_path
+	 */
+	public function __construct(filesystem $filesystem, $phpbb_root_path)
+	{
+		$this->filesystem		= $filesystem;
+		$this->phpbb_root_path	= $phpbb_root_path;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * @throws file_updater_failure_exception	When the file is not writable
+	 * @throws filesystem_exception				When the filesystem class fails
+	 */
+	public function delete_file($path_to_file)
+	{
+		$this->filesystem->remove($this->phpbb_root_path . $path_to_file);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * @throws file_updater_failure_exception	When the file is not writable
+	 * @throws filesystem_exception				When the filesystem class fails
+	 */
+	public function create_new_file($path_to_file_to_create, $source, $create_from_content = false)
+	{
+		$path_to_file_to_create = $this->phpbb_root_path . $path_to_file_to_create;
+
+		$dir = dirname($path_to_file_to_create);
+		if (!$this->filesystem->exists($dir))
+		{
+			$this->make_dir($dir);
+		}
+
+		$original_dir_perms = false;
+
+		if (!$this->filesystem->is_writable($dir))
+		{
+			// Extract last 9 bits we actually need
+			$original_dir_perms = @fileperms($dir) & 511;
+			$this->filesystem->phpbb_chmod($dir, filesystem::CHMOD_ALL);
+		}
+
+		if (!$create_from_content)
+		{
+			try
+			{
+				$this->filesystem->copy($source, $path_to_file_to_create);
+			}
+			catch (filesystem_exception $e)
+			{
+				$this->write_file($path_to_file_to_create, $source, $create_from_content);
+			}
+		}
+		else
+		{
+			$this->write_file($path_to_file_to_create, $source, $create_from_content);
+		}
+
+		if ($original_dir_perms !== false)
+		{
+			$this->filesystem->phpbb_chmod($dir, $original_dir_perms);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * @throws file_updater_failure_exception	When the file is not writable
+	 * @throws filesystem_exception				When the filesystem class fails
+	 */
+	public function update_file($path_to_file_to_update, $source, $create_from_content = false)
+	{
+		$path_to_file_to_update = $this->phpbb_root_path . $path_to_file_to_update;
+		$original_file_perms = false;
+
+		// Maybe necessary for binary files
+		$dir = dirname($path_to_file_to_update);
+		if (!$this->filesystem->exists($dir))
+		{
+			$this->make_dir($dir);
+		}
+
+		if (!$this->filesystem->is_writable($path_to_file_to_update))
+		{
+			// Extract last 9 bits we actually need
+			$original_file_perms = @fileperms($path_to_file_to_update) & 511;
+			$this->filesystem->phpbb_chmod($path_to_file_to_update, filesystem::CHMOD_WRITE);
+		}
+
+		if (!$create_from_content)
+		{
+			try
+			{
+				$this->filesystem->copy($source, $path_to_file_to_update, true);
+			}
+			catch (filesystem_exception $e)
+			{
+				$this->write_file($path_to_file_to_update, $source, $create_from_content);
+			}
+		}
+		else
+		{
+			$this->write_file($path_to_file_to_update, $source, $create_from_content);
+		}
+
+		if ($original_file_perms !== false)
+		{
+			$this->filesystem->phpbb_chmod($path_to_file_to_update, $original_file_perms);
+		}
+	}
+
+	/**
+	 * Creates directory structure
+	 *
+	 * @param string	$path	Path to the directory where the file should be placed (and non-existent)
+	 */
+	private function make_dir($path)
+	{
+		if (is_dir($path))
+		{
+			return;
+		}
+
+		$path = str_replace(DIRECTORY_SEPARATOR, '/', $path);
+		$this->filesystem->mkdir($path, 493); // 493 === 0755
+	}
+
+	/**
+	 * Fallback function for file writing
+	 *
+	 * @param string		$path_to_file			Path to the file's location
+	 * @param string		$source					Path to file to copy or string with the new file's content
+	 * @param bool|false	$create_from_content	Whether or not to use $source as the content, false by default
+	 *
+	 * @throws file_updater_failure_exception	When the file is not writable
+	 */
+	private function write_file($path_to_file, $source, $create_from_content = false)
+	{
+		if (!$create_from_content)
+		{
+			$source = @file_get_contents($source);
+		}
+
+		$file_pointer = @fopen($path_to_file, 'w');
+
+		if (!is_resource($file_pointer))
+		{
+			throw new file_updater_failure_exception();
+		}
+
+		@fwrite($file_pointer, $source);
+		@fclose($file_pointer);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_method_name()
+	{
+		return 'direct_file';
+	}
+}

phpbb/install/helper/file_updater/file_updater_interface.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\file_updater;
+
+interface file_updater_interface
+{
+	/**
+	 * Deletes a file
+	 *
+	 * @param string	$path_to_file	Path to the file to delete
+	 */
+	public function delete_file($path_to_file);
+
+	/**
+	 * Creates a new file
+	 *
+	 * @param string	$path_to_file_to_create	Path to the new file's location
+	 * @param string	$source					Path to file to copy or string with the new file's content
+	 * @param bool		$create_from_content	Whether or not to use $source as the content, false by default
+	 */
+	public function create_new_file($path_to_file_to_create, $source, $create_from_content = false);
+
+	/**
+	 * Update file
+	 *
+	 * @param string	$path_to_file_to_update	Path to the file's location
+	 * @param string	$source					Path to file to copy or string with the new file's content
+	 * @param bool		$create_from_content	Whether or not to use $source as the content, false by default
+	 */
+	public function update_file($path_to_file_to_update, $source, $create_from_content = false);
+
+	/**
+	 * Returns the name of the file updater method
+	 *
+	 * @return string
+	 */
+	public function get_method_name();
+}

phpbb/install/helper/file_updater/ftp_file_updater.php

@@ -0,0 +1,136 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\file_updater;
+
+use phpbb\install\helper\update_helper;
+
+/**
+ * File updater for FTP updates
+ */
+class ftp_file_updater implements file_updater_interface
+{
+	/**
+	 * @var \transfer
+	 */
+	protected $transfer;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param update_helper	$update_helper
+	 * @param string		$phpbb_root_path
+	 * @param string		$php_ext
+	 */
+	public function __construct(update_helper $update_helper, $phpbb_root_path, $php_ext)
+	{
+		$this->transfer			= null;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+	}
+
+	/**
+	 * Initialize FTP connection
+	 *
+	 * @param string	$method
+	 * @param string	$host
+	 * @param string	$user
+	 * @param string	$pass
+	 * @param string	$path
+	 * @param int		$port
+	 * @param int		$timeout
+	 */
+	public function init($method, $host, $user, $pass, $path, $port, $timeout)
+	{
+		$this->update_helper->include_file('includes/functions_transfer.' . $this->php_ext);
+		$this->transfer = new $method($host, $user, $pass, $path, $port, $timeout);
+		$this->transfer->open_session();
+	}
+
+	/**
+	 * Close FTP session
+	 */
+	public function close()
+	{
+		$this->transfer->close_session();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function delete_file($path_to_file)
+	{
+		$this->transfer->delete_file($path_to_file);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function create_new_file($path_to_file_to_create, $source, $create_from_content = false)
+	{
+		$dirname = dirname($path_to_file_to_create);
+
+		if ($dirname && !file_exists($this->phpbb_root_path . $dirname))
+		{
+			$this->transfer->make_dir($dirname);
+		}
+
+		if ($create_from_content)
+		{
+			$this->transfer->write_file($path_to_file_to_create, $source);
+		}
+		else
+		{
+			$this->transfer->copy_file($path_to_file_to_create, $source);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function update_file($path_to_file_to_update, $source, $create_from_content = false)
+	{
+		if ($create_from_content)
+		{
+			$this->transfer->write_file($path_to_file_to_update, $source);
+		}
+		else
+		{
+			$this->transfer->copy_file($path_to_file_to_update, $source);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_method_name()
+	{
+		return 'ftp';
+	}
+}

phpbb/install/helper/install_helper.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper;
+
+/**
+ * General helper functionality for the installer
+ */
+class install_helper
+{
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string	$phpbb_root_path	path to phpBB's root
+	 * @param string	$php_ext			Extension of PHP files
+	 */
+	public function __construct($phpbb_root_path, $php_ext)
+	{
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+	}
+
+	/**
+	 * Check whether phpBB is installed.
+	 *
+	 * @return bool
+	 */
+	public function is_phpbb_installed()
+	{
+		$config_path = $this->phpbb_root_path . 'config.' . $this->php_ext;
+		$install_lock_path = $this->phpbb_root_path . 'cache/install_lock';
+
+		if (file_exists($config_path) && !file_exists($install_lock_path) && filesize($config_path))
+		{
+			return true;
+		}
+
+		return false;
+	}
+}

phpbb/install/helper/iohandler/ajax_iohandler.php

@@ -0,0 +1,509 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+use phpbb\path_helper;
+use phpbb\routing\router;
+
+/**
+ * Input-Output handler for the AJAX frontend
+ */
+class ajax_iohandler extends iohandler_base
+{
+	/**
+	 * @var path_helper
+	 */
+	protected $path_helper;
+
+	/**
+	 * @var \phpbb\request\request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var \phpbb\template\template
+	 */
+	protected $template;
+
+	/**
+	 * @var router
+	 */
+	protected $router;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $file_status;
+
+	/**
+	 * @var string
+	 */
+	protected $form;
+
+	/**
+	 * @var bool
+	 */
+	protected $request_client_refresh;
+
+	/**
+	 * @var array
+	 */
+	protected $nav_data;
+
+	/**
+	 * @var array
+	 */
+	protected $cookies;
+
+	/**
+	 * @var array
+	 */
+	protected $download;
+
+	/**
+	 * @var array
+	 */
+	protected $redirect_url;
+
+	/**
+	 * @var resource
+	 */
+	protected $file_lock_pointer;
+
+	/**
+	 * Constructor
+	 *
+	 * @param path_helper						$path_helper
+	 * @param \phpbb\request\request_interface	$request	HTTP request interface
+	 * @param \phpbb\template\template			$template	Template engine
+	 * @param router 							$router		Router
+	 * @param string 							$root_path	Path to phpBB's root
+	 */
+	public function __construct(path_helper $path_helper, \phpbb\request\request_interface $request, \phpbb\template\template $template, router $router, $root_path)
+	{
+		$this->path_helper = $path_helper;
+		$this->request	= $request;
+		$this->router	= $router;
+		$this->template	= $template;
+		$this->form		= '';
+		$this->nav_data	= array();
+		$this->cookies	= array();
+		$this->download	= array();
+		$this->redirect_url = array();
+		$this->file_status = '';
+		$this->phpbb_root_path = $root_path;
+
+		parent::__construct();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_input($name, $default, $multibyte = false)
+	{
+		return $this->request->variable($name, $default, $multibyte);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_raw_input($name, $default)
+	{
+		return $this->request->raw_variable($name, $default);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_server_variable($name, $default = '')
+	{
+		return $this->request->server($name, $default);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_header_variable($name, $default = '')
+	{
+		return $this->request->header($name, $default);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_secure()
+	{
+		return $this->request->is_secure();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_user_form_group($title, $form)
+	{
+		$this->form = $this->generate_form_render_data($title, $form);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function generate_form_render_data($title, $form)
+	{
+		$this->template->assign_block_vars('options', array(
+			'LEGEND'	=> $this->language->lang($title),
+			'S_LEGEND'	=> true,
+		));
+
+		$not_button_form = false;
+
+		foreach ($form as $input_name => $input_options)
+		{
+			if (!isset($input_options['type']))
+			{
+				continue;
+			}
+
+			$tpl_ary = array();
+			$not_button_form = ($input_options['type'] !== 'submit' || $not_button_form);
+
+			$tpl_ary['TYPE'] = $input_options['type'];
+			$tpl_ary['TITLE'] = $this->language->lang($input_options['label']);
+			$tpl_ary['KEY'] = $input_name;
+			$tpl_ary['S_EXPLAIN'] = false;
+			$tpl_ary['DISABLED'] = isset($input_options['disabled']) ? $input_options['disabled'] : false;
+			$tpl_ary['IS_SECONDARY'] = isset($input_options['is_secondary']) ? $input_options['is_secondary'] : false;
+
+			if (isset($input_options['default']))
+			{
+				$default = $input_options['default'];
+				$default = preg_replace_callback('#\{L_([A-Z0-9\-_]*)\}#s', array($this, 'lang_replace_callback'), $default);
+				$tpl_ary['DEFAULT'] = $default;
+			}
+
+			if (isset($input_options['description']))
+			{
+				$tpl_ary['TITLE_EXPLAIN'] = $this->language->lang($input_options['description']);
+				$tpl_ary['S_EXPLAIN'] = true;
+			}
+
+			if (in_array($input_options['type'], array('select', 'radio'), true))
+			{
+				for ($i = 0, $total = count($input_options['options']); $i < $total; $i++)
+				{
+					if (isset($input_options['options'][$i]['label']))
+					{
+						$input_options['options'][$i]['label'] = $this->language->lang($input_options['options'][$i]['label']);
+					}
+				}
+
+				$tpl_ary['OPTIONS'] = $input_options['options'];
+			}
+
+			$block_name = ($input_options['type'] === 'submit') ? 'submit_buttons' : 'options';
+			$this->template->assign_block_vars($block_name, $tpl_ary);
+		}
+
+		if (isset($form['database_update_submit']) && !$form['database_update_submit']['disabled'])
+		{
+			$this->template->assign_var('FORM_TITLE', $this->language->lang('UPDATE_CONTINUE_UPDATE_PROCESS'));
+		}
+
+		$this->template->assign_var('S_NOT_ONLY_BUTTON_FORM', $not_button_form);
+
+		if (!$not_button_form)
+		{
+			$this->template->destroy_block_vars('options');
+		}
+
+		$this->template->set_filenames(array(
+			'form_install' => 'installer_form.html',
+		));
+
+		return $this->template->assign_display('form_install');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function send_response($no_more_output = false)
+	{
+		$json_data_array = $this->prepare_json_array($no_more_output);
+
+		if (empty($json_data_array))
+		{
+			return;
+		}
+
+		$json_data = json_encode($json_data_array);
+
+		// Try to push content to the browser
+		print(str_pad(' ', 4096) . "\n");
+		print($json_data . "\n\n");
+		flush();
+	}
+
+	/**
+	 * Prepares iohandler's data to be sent out to the client.
+	 *
+	 * @param bool	$no_more_output	Whether or not there will be more output in this response
+	 *
+	 * @return array
+	 */
+	protected function prepare_json_array($no_more_output = false)
+	{
+		$json_array = array();
+
+		if (!empty($this->errors))
+		{
+			$json_array['errors'] = $this->errors;
+			$this->errors = array();
+		}
+
+		if (!empty($this->warnings))
+		{
+			$json_array['warnings'] = $this->warnings;
+			$this->warnings = array();
+		}
+
+		if (!empty($this->logs))
+		{
+			$json_array['logs'] = $this->logs;
+			$this->logs = array();
+		}
+
+		if (!empty($this->success))
+		{
+			$json_array['success'] = $this->success;
+			$this->success = array();
+		}
+
+		if (!empty($this->download))
+		{
+			$json_array['download'] = $this->download;
+			$this->download = array();
+		}
+
+		if (!empty($this->form))
+		{
+			$json_array['form'] = $this->form;
+			$this->form = '';
+		}
+
+		if (!empty($this->file_status))
+		{
+			$json_array['file_status'] = $this->file_status;
+			$this->file_status = '';
+		}
+
+		// If current task name is set, we push progress message to the client side
+		if (!empty($this->current_task_name))
+		{
+			$json_array['progress'] = array(
+				'task_name'		=> $this->current_task_name,
+				'task_num'		=> $this->current_task_progress,
+				'task_count'	=> $this->task_progress_count,
+			);
+
+			if ($this->restart_progress_bar)
+			{
+				$json_array['progress']['restart'] = 1;
+				$this->restart_progress_bar = false;
+			}
+		}
+
+		if (!empty($this->nav_data))
+		{
+			$json_array['nav'] = $this->nav_data;
+			$this->nav_data = array();
+		}
+
+		if ($this->request_client_refresh)
+		{
+			$json_array['refresh'] = true;
+			$this->request_client_refresh = false;
+		}
+
+		if (!empty($this->cookies))
+		{
+			$json_array['cookies'] = $this->cookies;
+			$this->cookies = array();
+		}
+
+		if (!empty($this->redirect_url))
+		{
+			$json_array['redirect'] = $this->redirect_url;
+			$this->redirect_url = array();
+		}
+
+		if ($no_more_output)
+		{
+			$json_array['over'] = true;
+		}
+
+		return $json_array;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_progress($task_lang_key, $task_number)
+	{
+		parent::set_progress($task_lang_key, $task_number);
+		$this->send_response();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function request_refresh()
+	{
+		$this->request_client_refresh = true;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_active_stage_menu($menu_path)
+	{
+		$this->nav_data['active'] = $menu_path[count($menu_path) - 1];
+		$this->send_response();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_finished_stage_menu($menu_path)
+	{
+		$this->nav_data['finished'][] = $menu_path[count($menu_path) - 1];
+		$this->send_response();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_cookie($cookie_name, $cookie_value)
+	{
+		$this->cookies[] = array(
+			'name' => $cookie_name,
+			'value' => $cookie_value
+		);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_download_link($route, $title, $msg = null)
+	{
+		$link_properties = array(
+			'href'	=> $this->router->generate($route),
+			'title'	=> $this->language->lang($title),
+			'download' => $this->language->lang('DOWNLOAD'),
+		);
+
+		if ($msg !== null)
+		{
+			$link_properties['msg'] = htmlspecialchars_decode($this->language->lang($msg));
+		}
+
+		$this->download[] = $link_properties;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function render_update_file_status($status_array)
+	{
+		$this->template->assign_vars(array(
+			'T_IMAGE_PATH'	=> $this->path_helper->get_web_root_path() . 'adm/images/',
+		));
+
+		foreach ($status_array as $block => $list)
+		{
+			foreach ($list as $filename)
+			{
+				$dirname = dirname($filename);
+
+				$this->template->assign_block_vars($block, array(
+					'STATUS'			=> $block,
+					'FILENAME'			=> $filename,
+					'DIR_PART'			=> (!empty($dirname) && $dirname !== '.') ? dirname($filename) . '/' : false,
+					'FILE_PART'			=> basename($filename),
+				));
+			}
+		}
+
+		$this->template->set_filenames(array(
+			'file_status' => 'installer_update_file_status.html',
+		));
+
+		$this->file_status = $this->template->assign_display('file_status');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function redirect($url, $use_ajax = false)
+	{
+		$this->redirect_url = array('url' => $url, 'use_ajax' => $use_ajax);
+		$this->send_response(true);
+	}
+
+	/**
+	 * Acquires a file lock
+	 */
+	public function acquire_lock()
+	{
+		$lock_file = $this->phpbb_root_path . 'store/io_lock.lock';
+		$this->file_lock_pointer = @fopen($lock_file, 'w+');
+
+		if ($this->file_lock_pointer)
+		{
+			flock($this->file_lock_pointer, LOCK_EX);
+		}
+	}
+
+	/**
+	 * Release file lock
+	 */
+	public function release_lock()
+	{
+		if ($this->file_lock_pointer)
+		{
+			fwrite($this->file_lock_pointer, 'ok');
+			flock($this->file_lock_pointer, LOCK_UN);
+			fclose($this->file_lock_pointer);
+		}
+	}
+
+	/**
+	 * Callback function for language replacing
+	 *
+	 * @param array	$matches
+	 * @return string
+	 */
+	public function lang_replace_callback($matches)
+	{
+		if (!empty($matches[1]))
+		{
+			return $this->language->lang($matches[1]);
+		}
+
+		return '';
+	}
+}

phpbb/install/helper/iohandler/cli_iohandler.php

@@ -0,0 +1,323 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+use phpbb\install\exception\installer_exception;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\OutputStyle;
+
+/**
+ * Input-Output handler for the CLI frontend
+ */
+class cli_iohandler extends iohandler_base
+{
+	/**
+	 * @var OutputInterface
+	 */
+	protected $output;
+
+	/**
+	 * @var OutputStyle
+	 */
+	protected $io;
+
+	/**
+	 * @var array
+	 */
+	protected $input_values = array();
+
+	/**
+	 * @var \Symfony\Component\Console\Helper\ProgressBar
+	 */
+	protected $progress_bar;
+
+	/**
+	 * Set the style and output used to display feedback;
+	 *
+	 * @param OutputStyle 		$style
+	 * @param OutputInterface	$output
+	 */
+	public function set_style(OutputStyle $style, OutputInterface $output)
+	{
+		$this->io = $style;
+		$this->output = $output;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_input($name, $default, $multibyte = false)
+	{
+		$result = $default;
+
+		if (isset($this->input_values[$name]))
+		{
+			$result = $this->input_values[$name];
+		}
+
+		if ($multibyte)
+		{
+			return utf8_normalize_nfc($result);
+		}
+
+		return $result;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_raw_input($name, $default)
+	{
+		return $this->get_input($name, $default, true);
+	}
+
+	/**
+	 * Set input variable
+	 *
+	 * @param string $name Name of input variable
+	 * @param mixed $value Value of input variable
+	 */
+	public function set_input($name, $value)
+	{
+		$this->input_values[$name] = $value;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_server_variable($name, $default = '')
+	{
+		return $default;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_header_variable($name, $default = '')
+	{
+		return $default;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_secure()
+	{
+		return false;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_user_form_group($title, $form)
+	{
+		throw new installer_exception('MISSING_DATA');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function send_response($no_more_output = false)
+	{
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_error_message($error_title, $error_description = false)
+	{
+		$this->io->newLine();
+		$message = $this->translate_message($error_title, $error_description);
+		$message_string = $message['title'] . (!empty($message['description']) ? "\n" . $message['description'] : '');
+
+		if (strpos($message_string, '<br />') !== false)
+		{
+			$message_string = strip_tags(str_replace('<br />', "\n", $message_string));
+		}
+
+		$this->io->error($message_string);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->io->newLine(2);
+			$this->progress_bar->display();
+		}
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_warning_message($warning_title, $warning_description = false)
+	{
+		$this->io->newLine();
+
+		$message = $this->translate_message($warning_title, $warning_description);
+		$message_string = $message['title'] . (!empty($message['description']) ? "\n" . $message['description'] : '');
+		$this->io->warning($message_string);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->io->newLine(2);
+			$this->progress_bar->display();
+		}
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_log_message($log_title, $log_description = false)
+	{
+		if ($this->output->getVerbosity() > OutputInterface::VERBOSITY_NORMAL)
+		{
+			$message = $this->translate_message($log_title, $log_description);
+			$this->output->writeln(sprintf('[%3d/%-3d] ---- %s', $this->current_task_progress, $this->task_progress_count, $message['title']));
+		}
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_success_message($error_title, $error_description = false)
+	{
+		$this->io->newLine();
+
+		$message = $this->translate_message($error_title, $error_description);
+		$message_string = $message['title'] . (!empty($message['description']) ? "\n" . $message['description'] : '');
+		$this->io->success($message_string);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->io->newLine(2);
+			$this->progress_bar->display();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_task_count($task_count, $restart = false)
+	{
+		parent::set_task_count($task_count, $restart);
+
+		if ($this->output->getVerbosity() === OutputInterface::VERBOSITY_NORMAL)
+		{
+			if ($this->progress_bar !== null)
+			{
+				// Symfony's ProgressBar is immutable regarding task_count, so delete the old and create a new one.
+				$this->progress_bar->clear();
+			}
+			else
+			{
+				$this->io->newLine(2);
+			}
+
+			$this->progress_bar = $this->io->createProgressBar($task_count);
+			$this->progress_bar->setFormat(
+				"    %current:3s%/%max:-3s% %bar%  %percent:3s%%\n" .
+				"             %message%\n");
+			$this->progress_bar->setBarWidth(60);
+
+			if (!defined('PHP_WINDOWS_VERSION_BUILD'))
+			{
+				$this->progress_bar->setEmptyBarCharacter('░'); // light shade character \u2591
+				$this->progress_bar->setProgressCharacter('');
+				$this->progress_bar->setBarCharacter('▓'); // dark shade character \u2593
+			}
+
+			$this->progress_bar->setMessage('');
+			$this->progress_bar->start();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_progress($task_lang_key, $task_number)
+	{
+		parent::set_progress($task_lang_key, $task_number);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->progress_bar->setProgress($this->current_task_progress);
+			$this->progress_bar->setMessage($this->current_task_name);
+		}
+		else
+		{
+			$this->output->writeln(sprintf('[%3d/%-3d] %s', $this->current_task_progress, $this->task_progress_count, $this->current_task_name));
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function finish_progress($message_lang_key)
+	{
+		parent::finish_progress($message_lang_key);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->progress_bar->finish();
+			$this->progress_bar = null;
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function request_refresh()
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_active_stage_menu($menu_path)
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_finished_stage_menu($menu_path)
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_cookie($cookie_name, $cookie_value)
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_download_link($route, $title, $msg = null)
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function render_update_file_status($status_array)
+	{
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function redirect($url, $use_ajax = false)
+	{
+	}
+}

phpbb/install/helper/iohandler/exception/iohandler_not_implemented_exception.php

@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler\exception;
+
+class iohandler_not_implemented_exception extends \Exception
+{
+
+}

phpbb/install/helper/iohandler/factory.php

@@ -0,0 +1,79 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+use phpbb\install\helper\iohandler\exception\iohandler_not_implemented_exception;
+
+/**
+ * Input-output handler factory
+ */
+class factory
+{
+	/**
+	 * @var \Symfony\Component\DependencyInjection\ContainerInterface
+	 */
+	protected $container;
+
+	/**
+	 * @var string
+	 */
+	protected $environment;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \Symfony\Component\DependencyInjection\ContainerInterface $container Dependency injection container
+	 */
+	public function __construct(\Symfony\Component\DependencyInjection\ContainerInterface $container)
+	{
+		$this->container	= $container;
+		$this->environment	= null;
+	}
+
+	/**
+	 * @param string	$environment	The name of the input-output handler to use
+	 */
+	public function set_environment($environment)
+	{
+		$this->environment = $environment;
+	}
+
+	/**
+	 * Factory getter for iohandler
+	 *
+	 * @return \phpbb\install\helper\iohandler\iohandler_interface
+	 *
+	 * @throws \phpbb\install\helper\iohandler\exception\iohandler_not_implemented_exception
+	 * 		When the specified iohandler_interface does not exists
+	 */
+	public function get()
+	{
+		switch ($this->environment)
+		{
+			case 'ajax':
+				return $this->container->get('installer.helper.iohandler_ajax');
+			break;
+			case 'nojs':
+				// @todo replace this
+				return $this->container->get('installer.helper.iohandler_ajax');
+			break;
+			case 'cli':
+				return $this->container->get('installer.helper.iohandler_cli');
+			break;
+			default:
+				throw new iohandler_not_implemented_exception();
+			break;
+		}
+	}
+}

phpbb/install/helper/iohandler/iohandler_base.php

@@ -0,0 +1,209 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+/**
+ * Base class for installer input-output handlers
+ */
+abstract class iohandler_base implements iohandler_interface
+{
+	/**
+	 * Array of errors
+	 *
+	 * Errors should be added, when the installation cannot continue without
+	 * user interaction. If the aim is to notify the user about something, please
+	 * use a warning instead.
+	 *
+	 * @var array
+	 */
+	protected $errors;
+
+	/**
+	 * Array of warnings
+	 *
+	 * @var array
+	 */
+	protected $warnings;
+
+	/**
+	 * Array of logs
+	 *
+	 * @var array
+	 */
+	protected $logs;
+
+	/**
+	 * Array of success messages
+	 *
+	 * @var array
+	 */
+	protected $success;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var int
+	 */
+	protected $task_progress_count;
+
+	/**
+	 * @var int
+	 */
+	protected $current_task_progress;
+
+	/**
+	 * @var string
+	 */
+	protected $current_task_name;
+
+	/**
+	 * @var bool
+	 */
+	protected $restart_progress_bar;
+
+	/**
+	 * Constructor
+	 */
+	public function __construct()
+	{
+		$this->errors	= array();
+		$this->warnings	= array();
+		$this->logs		= array();
+		$this->success	= array();
+
+		$this->restart_progress_bar		= false;
+		$this->task_progress_count		= 0;
+		$this->current_task_progress	= 0;
+		$this->current_task_name		= '';
+	}
+
+	/**
+	 * Set language service
+	 *
+	 * @param \phpbb\language\language $language
+	 */
+	public function set_language(\phpbb\language\language $language)
+	{
+		$this->language = $language;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_error_message($error_title, $error_description = false)
+	{
+		if (!is_array($error_title) && strpos($error_title, '<br />') !== false)
+		{
+			$error_title = strip_tags(htmlspecialchars_decode($error_title));
+		}
+		$this->errors[] = $this->translate_message($error_title, $error_description);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_warning_message($warning_title, $warning_description = false)
+	{
+		$this->warnings[] = $this->translate_message($warning_title, $warning_description);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_log_message($log_title, $log_description = false)
+	{
+		$this->logs[] = $this->translate_message($log_title, $log_description);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_success_message($success_title, $success_description = false)
+	{
+		$this->success[] = $this->translate_message($success_title, $success_description);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_task_count($task_count, $restart = false)
+	{
+		$this->task_progress_count = $task_count;
+		$this->restart_progress_bar = $restart;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function set_progress($task_lang_key, $task_number)
+	{
+		$this->current_task_name = '';
+
+		if (!empty($task_lang_key))
+		{
+			$this->current_task_name = $this->language->lang($task_lang_key);
+		}
+
+		$this->current_task_progress = $task_number;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function finish_progress($message_lang_key)
+	{
+		if (!empty($message_lang_key))
+		{
+			$this->current_task_name = $this->language->lang($message_lang_key);
+		}
+
+		$this->current_task_progress = $this->task_progress_count;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function generate_form_render_data($title, $form)
+	{
+		return '';
+	}
+
+	/**
+	 * Localize message.
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param array|string		$title			Title of the message
+	 * @param array|string|bool	$description	Description of the message
+	 *
+	 * @return array	Localized message in an array
+	 */
+	protected function translate_message($title, $description)
+	{
+		$message_array = array();
+
+		$message_array['title'] = call_user_func_array(array($this->language, 'lang'), (array) $title);
+
+		if ($description !== false)
+		{
+			$message_array['description'] = call_user_func_array(array($this->language, 'lang'), (array) $description);
+		}
+
+		return $message_array;
+	}
+}

phpbb/install/helper/iohandler/iohandler_interface.php

@@ -0,0 +1,222 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+/**
+ * Input-Output handler interface for the installer
+ */
+interface iohandler_interface
+{
+	/**
+	 * Renders or returns response message
+	 *
+	 * @param bool	$no_more_output	Whether or not there will be more output in this output unit
+	 */
+	public function send_response($no_more_output = false);
+
+	/**
+	 * Returns input variable
+	 *
+	 * @param string	$name		Name of the input variable to obtain
+	 * @param mixed		$default	A default value that is returned if the variable was not set.
+	 * 								This function will always return a value of the same type as the default.
+	 * @param bool		$multibyte	If $default is a string this paramater has to be true if the variable may contain any UTF-8 characters
+	 *								Default is false, causing all bytes outside the ASCII range (0-127) to be replaced with question marks
+	 *
+	 * @return mixed	Value of the input variable
+	 */
+	public function get_input($name, $default, $multibyte = false);
+
+	/**
+	 * Returns raw input variable
+	 *
+	 * @param string	$name		Name of the input variable to obtain
+	 * @param mixed		$default	A default value that is returned if the variable was not set.
+	 * 								This function will always return a value of the same type as the default.
+	 *
+	 * @return mixed	Value of the raw input variable
+	 */
+	public function get_raw_input($name, $default);
+
+	/**
+	 * Returns server variable
+	 *
+	 * This function should work the same as request_interface::server().
+	 *
+	 * @param string	$name		Name of the server variable
+	 * @param mixed		$default	Default value to return when the requested variable does not exist
+	 *
+	 * @return mixed	Value of the server variable
+	 */
+	public function get_server_variable($name, $default = '');
+
+	/**
+	 * Wrapper function for request_interface::header()
+	 *
+	 * @param string	$name		Name of the request header variable
+	 * @param mixed		$default	Default value to return when the requested variable does not exist
+	 *
+	 * @return mixed
+	 */
+	public function get_header_variable($name, $default = '');
+
+	/**
+	 * Returns true if the connection is encrypted
+	 *
+	 * @return bool
+	 */
+	public function is_secure();
+
+	/**
+	 * Adds an error message to the rendering queue
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param string|array		$error_title		Title of the error message.
+	 * @param string|bool|array	$error_description	Description of the error (and possibly guidelines to resolve it),
+	 * 												or false if the error description is not available.
+	 */
+	public function add_error_message($error_title, $error_description = false);
+
+	/**
+	 * Adds a warning message to the rendering queue
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param string|array		$warning_title			Title of the warning message
+	 * @param string|bool|array	$warning_description	Description of the warning (and possibly guidelines to resolve it),
+	 * 													or false if the warning description is not available
+	 */
+	public function add_warning_message($warning_title, $warning_description = false);
+
+	/**
+	 * Adds a log message to the rendering queue
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param string|array		$log_title			Title of the log message
+	 * @param string|bool|array	$log_description	Description of the log,
+	 * 												or false if the log description is not available
+	 */
+	public function add_log_message($log_title, $log_description = false);
+
+	/**
+	 * Adds a success message to the rendering queue
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param string|array		$success_title			Title of the success message
+	 * @param string|bool|array	$success_description	Description of the success,
+	 * 													or false if the success description is not available
+	 *
+	 * @return null
+	 */
+	public function add_success_message($success_title, $success_description = false);
+
+	/**
+	 * Adds a requested data group to the rendering queue
+	 *
+	 * @param string	$title	Language variable with the title of the form
+	 * @param array		$form	An array describing the required data (options etc)
+	 */
+	public function add_user_form_group($title, $form);
+
+	/**
+	 * Returns the rendering information for the form
+	 *
+	 * @param string	$title	Language variable with the title of the form
+	 * @param array		$form	An array describing the required data (options etc)
+	 *
+	 * @return string	Information to render the form
+	 */
+	public function generate_form_render_data($title, $form);
+
+	/**
+	 * Sets the number of tasks belonging to the installer in the current mode.
+	 *
+	 * @param int	$task_count	Number of tasks
+	 * @param bool	$restart	Whether or not to restart the progress bar, false by default
+	 */
+	public function set_task_count($task_count, $restart = false);
+
+	/**
+	 * Sets the progress information
+	 *
+	 * @param string	$task_lang_key	Language key for the name of the task
+	 * @param int		$task_number	Position of the current task in the task queue
+	 */
+	public function set_progress($task_lang_key, $task_number);
+
+	/**
+	 * Sends refresh request to the client
+	 */
+	public function request_refresh();
+
+	/**
+	 * Marks stage as active in the navigation bar
+	 *
+	 * @param array	$menu_path	Array to the navigation elem
+	 */
+	public function set_active_stage_menu($menu_path);
+
+	/**
+	 * Marks stage as completed in the navigation bar
+	 *
+	 * @param array	$menu_path	Array to the navigation elem
+	 */
+	public function set_finished_stage_menu($menu_path);
+
+	/**
+	 * Finish the progress bar
+	 *
+	 * @param string	$message_lang_key	Language key for the message
+	 */
+	public function finish_progress($message_lang_key);
+
+	/**
+	 * Adds a download link
+	 *
+	 * @param string			$route	Route for the link
+	 * @param string			$title	Language key for the title
+	 * @param string|null|array	$msg	Language key for the message
+	 */
+	public function add_download_link($route, $title, $msg = null);
+
+	/**
+	 * Redirects the user to a new page
+	 *
+	 * @param string	$url		URL to redirect to
+	 * @param bool		$use_ajax	Whether or not to use AJAX redirect
+	 */
+	public function redirect($url, $use_ajax = false);
+
+	/**
+	 * Renders the status of update files
+	 *
+	 * @param array	$status_array	Array containing files in groups to render
+	 */
+	public function render_update_file_status($status_array);
+
+	/**
+	 * Sends and sets cookies
+	 *
+	 * @param string	$cookie_name	Name of the cookie to set
+	 * @param string	$cookie_value	Value of the cookie to set
+	 */
+	public function set_cookie($cookie_name, $cookie_value);
+}

phpbb/install/helper/navigation/convertor_navigation.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+use phpbb\install\helper\install_helper;
+
+class convertor_navigation implements navigation_interface
+{
+	/**
+	 * @var install_helper
+	 */
+	private $install_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param install_helper	$install_helper
+	 */
+	public function __construct(install_helper $install_helper)
+	{
+		$this->install_helper = $install_helper;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get()
+	{
+		if (!$this->install_helper->is_phpbb_installed())
+		{
+			return array();
+		}
+
+		return array(
+			'convert'	=> array(
+				'label'	=> 'CONVERT',
+				'route'	=> 'phpbb_convert_intro',
+				'order'	=> 3,
+				array(
+					'intro'	=> array(
+						'label'	=> 'SUB_INTRO',
+						'stage'	=> true,
+						'order'	=> 0,
+					),
+					'settings'	=> array(
+						'label'	=> 'STAGE_SETTINGS',
+						'stage'	=> true,
+						'route'	=> 'phpbb_convert_settings',
+						'order'	=> 1,
+					),
+					'convert'	=> array(
+						'label'	=> 'STAGE_IN_PROGRESS',
+						'stage'	=> true,
+						'route'	=> 'phpbb_convert_convert',
+						'order'	=> 2,
+					),
+					'finish'	=> array(
+						'label'	=> 'CONVERT_COMPLETE',
+						'stage'	=> true,
+						'route'	=> 'phpbb_convert_finish',
+						'order'	=> 3,
+					),
+				),
+			),
+		);
+	}
+}

phpbb/install/helper/navigation/install_navigation.php

@@ -0,0 +1,75 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+use phpbb\install\helper\install_helper;
+
+class install_navigation implements navigation_interface
+{
+	/**
+	 * @var install_helper
+	 */
+	private $install_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param install_helper	$install_helper
+	 */
+	public function __construct(install_helper $install_helper)
+	{
+		$this->install_helper = $install_helper;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get()
+	{
+		if ($this->install_helper->is_phpbb_installed())
+		{
+			return array();
+		}
+
+		return array(
+			'install'	=> array(
+				'label'	=> 'INSTALL',
+				'route'	=> 'phpbb_installer_install',
+				'order'	=> 1,
+				array(
+					'introduction'	=> array(
+						'label'	=> 'INTRODUCTION_TITLE',
+						'stage'	=> true,
+						'order'	=> 0,
+					),
+					'requirements'	=> array(
+						'label'	=> 'STAGE_REQUIREMENTS',
+						'stage'	=> true,
+						'order'	=> 1,
+					),
+					'obtain_data'	=> array(
+						'label'	=> 'STAGE_OBTAIN_DATA',
+						'stage'	=> true,
+						'order'	=> 2,
+					),
+					'install'	=> array(
+						'label'	=> 'STAGE_INSTALL',
+						'stage'	=> true,
+						'order'	=> 3,
+					),
+				),
+			),
+		);
+	}
+}

phpbb/install/helper/navigation/main_navigation.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+class main_navigation implements navigation_interface
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get()
+	{
+		return array(
+			'overview'	=> array(
+				'label'	=> 'MENU_OVERVIEW',
+				'route'	=> 'phpbb_installer_index',
+				'order'	=> 0,
+				array(
+					'introduction'	=> array(
+						'label'	=> 'MENU_INTRO',
+						'route'	=> 'phpbb_installer_index',
+						'order'	=> 0,
+					),
+					'support'	=> array(
+						'label'	=> 'MENU_SUPPORT',
+						'route'	=> 'phpbb_installer_support',
+						'order'	=> 1,
+					),
+					'license'	=> array(
+						'label'	=> 'MENU_LICENSE',
+						'route'	=> 'phpbb_installer_license',
+						'order'	=> 2,
+					),
+				),
+			),
+		);
+	}
+}

phpbb/install/helper/navigation/navigation_interface.php

@@ -0,0 +1,43 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+/**
+ * Interface for installer's navigation defining services
+ */
+interface navigation_interface
+{
+	/**
+	 * Returns an array with the navigation items
+	 *
+	 * The returned array should have the following format:
+	 * <code>
+	 * array(
+	 * 	'parent_nav_name' => array(
+	 * 		'nav_name' => array(
+	 * 			'label' => 'MY_MENU',
+	 * 			'route' => 'phpbb_route_name',
+	 * 		)
+	 * 	)
+	 * )
+	 * </code>
+	 *
+	 * Navigation item setting options:
+	 * 	- label: The language variable name
+	 * 	- route: Name of the route which it is belongs to
+	 *
+	 * @return array
+	 */
+	public function get();
+}

phpbb/install/helper/navigation/navigation_provider.php

@@ -0,0 +1,121 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+use phpbb\di\service_collection;
+
+/**
+ * Installers navigation provider
+ */
+class navigation_provider
+{
+	/**
+	 * @var array
+	 */
+	private $menu_collection;
+
+	/**
+	 * Constructor
+	 *
+	 * @param service_collection		$plugins
+	 */
+	public function __construct(service_collection $plugins)
+	{
+		$this->menu_collection	= array();
+
+		foreach ($plugins as $plugin => $plugin_instance)
+		{
+			$this->register($plugin_instance);
+		}
+	}
+
+	/**
+	 * Returns navigation array
+	 *
+	 * @return array
+	 */
+	public function get()
+	{
+		return $this->menu_collection;
+	}
+
+	/**
+	 * Registers a navigation provider's navigation items
+	 *
+	 * @param navigation_interface	$navigation
+	 */
+	public function register(navigation_interface $navigation)
+	{
+		$nav_arry = $navigation->get();
+		$this->menu_collection = $this->merge($nav_arry, $this->menu_collection);
+	}
+
+	/**
+	 * Set a property in the navigation array
+	 *
+	 * @param array	$nav_element	Array to the navigation elem
+	 * @param array	$property_array	Array with the properties to set
+	 */
+	public function set_nav_property($nav_element, $property_array)
+	{
+		$array_pointer = array();
+		$array_root_pointer = &$array_pointer;
+		foreach ($nav_element as $array_path)
+		{
+			$array_pointer[$array_path] = array();
+			$array_pointer = &$array_pointer[$array_path];
+		}
+
+		$array_pointer = $property_array;
+
+		$this->menu_collection = $this->merge($array_root_pointer, $this->menu_collection);
+	}
+
+	/**
+	 * Recursive array merge
+	 *
+	 * This function is necessary to be able to replace the options of
+	 * already set navigation items.
+	 *
+	 * @param array	$array_to_merge
+	 * @param array	$array_to_merge_into
+	 *
+	 * @return array	Merged array
+	 */
+	private function merge($array_to_merge, $array_to_merge_into)
+	{
+		$merged_array = $array_to_merge_into;
+
+		foreach ($array_to_merge as $key => $value)
+		{
+			if (isset($array_to_merge_into[$key]))
+			{
+				if (is_array($array_to_merge_into[$key]) && is_array($value))
+				{
+					$merged_array[$key] = $this->merge($value, $array_to_merge_into[$key]);
+				}
+				else
+				{
+					$merged_array[$key] = $value;
+				}
+			}
+			else
+			{
+				$merged_array[$key] = $value;
+			}
+		}
+
+		return $merged_array;
+	}
+}

phpbb/install/helper/navigation/update_navigation.php

@@ -0,0 +1,80 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\navigation;
+
+use phpbb\install\helper\install_helper;
+
+class update_navigation implements navigation_interface
+{
+	/**
+	 * @var install_helper
+	 */
+	private $install_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param install_helper	$install_helper
+	 */
+	public function __construct(install_helper $install_helper)
+	{
+		$this->install_helper = $install_helper;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get()
+	{
+		if (!$this->install_helper->is_phpbb_installed())
+		{
+			return array();
+		}
+
+		return array(
+			'update' => array(
+				'label'		=> 'UPDATE',
+				'route'		=> 'phpbb_installer_update',
+				'order'		=> 1,
+				array(
+					'introduction'	=> array(
+						'label'	=> 'INTRODUCTION_TITLE',
+						'stage'	=> true,
+						'order'	=> 0,
+					),
+					'requirements'	=> array(
+						'label'	=> 'STAGE_REQUIREMENTS',
+						'stage'	=> true,
+						'order'	=> 1,
+					),
+					'obtain_data'	=> array(
+						'label'	=> 'STAGE_OBTAIN_DATA',
+						'stage'	=> true,
+						'order'	=> 2,
+					),
+					'update_files'	=> array(
+						'label'	=> 'STAGE_UPDATE_FILES',
+						'stage'	=> true,
+						'order'	=> 3,
+					),
+					'update_database'	=> array(
+						'label'	=> 'STAGE_UPDATE_DATABASE',
+						'stage'	=> true,
+						'order'	=> 4,
+					),
+				),
+			),
+		);
+	}
+}

phpbb/install/helper/update_helper.php

@@ -0,0 +1,113 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper;
+
+/**
+ * General helper functionality for the updater
+ */
+class update_helper
+{
+	/**
+	 * @var string
+	 */
+	protected $path_to_new_files;
+
+	/**
+	 * @var string
+	 */
+	protected $path_to_old_files;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param string	$phpbb_root_path
+	 */
+	public function __construct($phpbb_root_path)
+	{
+		$this->phpbb_root_path		= $phpbb_root_path;
+		$this->path_to_new_files	= $phpbb_root_path . 'install/update/new/';
+		$this->path_to_old_files	= $phpbb_root_path . 'install/update/old/';
+	}
+
+	/**
+	 * Returns path to new update files
+	 *
+	 * @return string
+	 */
+	public function get_path_to_new_update_files()
+	{
+		return $this->path_to_new_files;
+	}
+
+	/**
+	 * Returns path to new update files
+	 *
+	 * @return string
+	 */
+	public function get_path_to_old_update_files()
+	{
+		return $this->path_to_old_files;
+	}
+
+	/**
+	 * Includes the updated file if available
+	 *
+	 * @param string	$filename	Path to the file relative to phpBB root path
+	 */
+	public function include_file($filename)
+	{
+		if (is_file($this->path_to_new_files . $filename))
+		{
+			include_once($this->path_to_new_files . $filename);
+		}
+		else if (is_file($this->phpbb_root_path . $filename))
+		{
+			include_once($this->phpbb_root_path . $filename);
+		}
+	}
+
+	/**
+	 * Customized version_compare()
+	 *
+	 * @param string		$version_number1
+	 * @param string		$version_number2
+	 * @param string|null	$operator
+	 * @return int|bool	The returned value is identical to the PHP build-in function version_compare()
+	 */
+	public function phpbb_version_compare($version_number1, $version_number2, $operator = null)
+	{
+		if ($operator === null)
+		{
+			$result = version_compare(
+				str_replace('rc', 'RC', strtolower($version_number1)),
+				str_replace('rc', 'RC', strtolower($version_number2))
+			);
+		}
+		else
+		{
+			$result = version_compare(
+				str_replace('rc', 'RC', strtolower($version_number1)),
+				str_replace('rc', 'RC', strtolower($version_number2)),
+				$operator
+			);
+		}
+
+		return $result;
+	}
+}

phpbb/install/installer.php

@@ -0,0 +1,350 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+use phpbb\cache\driver\driver_interface;
+use phpbb\di\ordered_service_collection;
+use phpbb\install\exception\cannot_build_container_exception;
+use phpbb\install\exception\installer_config_not_writable_exception;
+use phpbb\install\exception\jump_to_restart_point_exception;
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\iohandler\ajax_iohandler;
+use phpbb\install\helper\iohandler\cli_iohandler;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\path_helper;
+
+class installer
+{
+	/**
+	 * @var driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var container_factory
+	 */
+	protected $container_factory;
+
+	/**
+	 * @var config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var ordered_service_collection
+	 */
+	protected $installer_modules;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $web_root;
+
+	/**
+	 * Stores the number of steps that a given module has
+	 *
+	 * @var array
+	 */
+	protected $module_step_count;
+
+	/**
+	 * @var bool
+	 */
+	protected $purge_cache_before;
+
+	/**
+	 * Constructor
+	 *
+	 * @param driver_interface	$cache			Cache service
+	 * @param config			$config			Installer config handler
+	 * @param path_helper		$path_helper	Path helper
+	 * @param container_factory	$container		Container
+	 */
+	public function __construct(driver_interface $cache, config $config, path_helper $path_helper, container_factory $container)
+	{
+		$this->cache				= $cache;
+		$this->install_config		= $config;
+		$this->container_factory	= $container;
+		$this->installer_modules	= null;
+		$this->web_root				= $path_helper->get_web_root_path();
+		$this->purge_cache_before	= false;
+	}
+
+	/**
+	 * Sets modules to execute
+	 *
+	 * Note: The installer will run modules in the order they are set in
+	 * the array.
+	 *
+	 * @param ordered_service_collection	$modules	Service collection of module service names
+	 */
+	public function set_modules(ordered_service_collection $modules)
+	{
+		$this->installer_modules = $modules;
+	}
+
+	/**
+	 * Sets input-output handler objects
+	 *
+	 * @param iohandler_interface	$iohandler
+	 */
+	public function set_iohandler(iohandler_interface $iohandler)
+	{
+		$this->iohandler = $iohandler;
+	}
+
+	/**
+	 * Sets whether to purge cache before the installation process
+	 *
+	 * @param bool	$purge_cache_before
+	 */
+	public function set_purge_cache_before($purge_cache_before)
+	{
+		$this->purge_cache_before = $purge_cache_before;
+	}
+
+	/**
+	 * Run phpBB installer
+	 */
+	public function run()
+	{
+		if ($this->iohandler instanceof ajax_iohandler)
+		{
+			$this->iohandler->acquire_lock();
+		}
+
+		// Load install progress
+		$this->install_config->load_config();
+
+		if (!$this->install_config->get('cache_purged_before', false) && $this->purge_cache_before)
+		{
+			/** @var \phpbb\cache\driver\driver_interface $cache */
+			$cache = $this->container_factory->get('cache.driver');
+			$cache->purge();
+			$this->install_config->set('cache_purged_before', true);
+		}
+
+		// Recover install progress
+		$module_index = $this->recover_progress();
+
+		// Variable used to check if the install process have been finished
+		$install_finished	= false;
+		$fail_cleanup		= false;
+		$send_refresh		= false;
+
+		// We are installing something, so the introduction stage can go now...
+		$this->install_config->set_finished_navigation_stage(array('install', 0, 'introduction'));
+		$this->iohandler->set_finished_stage_menu(array('install', 0, 'introduction'));
+
+		if ($this->install_config->get_task_progress_count() === 0)
+		{
+			// Count all tasks in the current installer modules
+			$step_count = 0;
+
+			/** @var \phpbb\install\module_interface $module */
+			foreach ($this->installer_modules as $name => $module)
+			{
+				$module_step_count = $module->get_step_count();
+				$step_count += $module_step_count;
+				$this->module_step_count[$name] = $module_step_count;
+			}
+
+			// Set task count
+			$this->install_config->set_task_progress_count($step_count);
+		}
+
+		// Set up progress information
+		$this->iohandler->set_task_count(
+			$this->install_config->get_task_progress_count()
+		);
+
+		try
+		{
+			$iterator = $this->installer_modules->getIterator();
+
+			if ($module_index < $iterator->count())
+			{
+				$iterator->seek($module_index);
+			}
+			else
+			{
+				$iterator->seek($module_index - 1);
+				$iterator->next();
+			}
+
+			while ($iterator->valid())
+			{
+				$module	= $iterator->current();
+				$name	= $iterator->key();
+
+				// Check if module should be executed
+				if (!$module->is_essential() && !$module->check_requirements())
+				{
+					$this->install_config->set_finished_navigation_stage($module->get_navigation_stage_path());
+					$this->iohandler->set_finished_stage_menu($module->get_navigation_stage_path());
+
+					$this->iohandler->add_log_message(array(
+						'SKIP_MODULE',
+						$name,
+					));
+					$this->install_config->increment_current_task_progress($this->module_step_count[$name]);
+				}
+				else
+				{
+					// Set the correct stage in the navigation bar
+					$this->install_config->set_active_navigation_stage($module->get_navigation_stage_path());
+					$this->iohandler->set_active_stage_menu($module->get_navigation_stage_path());
+
+					$this->iohandler->send_response();
+
+					$module->run();
+
+					$this->install_config->set_finished_navigation_stage($module->get_navigation_stage_path());
+					$this->iohandler->set_finished_stage_menu($module->get_navigation_stage_path());
+				}
+
+				$module_index++;
+				$iterator->next();
+
+				// Save progress
+				$this->install_config->set_active_module($name, $module_index);
+
+				if ($iterator->valid() && ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0))
+				{
+					throw new resource_limit_reached_exception();
+				}
+			}
+
+			// Installation finished
+			$install_finished = true;
+
+			if ($this->iohandler instanceof cli_iohandler)
+			{
+				$this->iohandler->add_success_message('INSTALLER_FINISHED');
+			}
+			else
+			{
+				// Start session if not installing and get user object
+				// to allow redirecting to ACP
+				$user = $this->container_factory->get('user');
+				if (!isset($module) || !($module instanceof \phpbb\install\module\install_finish\module))
+				{
+					$auth = $this->container_factory->get('auth');
+
+					$user->session_begin();
+					$auth->acl($user->data);
+					$user->setup();
+				}
+
+				$phpbb_root_path = $this->container_factory->get_parameter('core.root_path');
+
+				$acp_url = append_sid($phpbb_root_path . 'adm/index.php', 'i=acp_help_phpbb&mode=help_phpbb', true, $user->session_id);
+				$this->iohandler->add_success_message('INSTALLER_FINISHED', array(
+					'ACP_LINK',
+					$acp_url,
+				));
+			}
+		}
+		catch (user_interaction_required_exception $e)
+		{
+			$this->iohandler->send_response(true);
+		}
+		catch (resource_limit_reached_exception $e)
+		{
+			$send_refresh = true;
+		}
+		catch (jump_to_restart_point_exception $e)
+		{
+			$this->install_config->jump_to_restart_point($e->get_restart_point_name());
+			$send_refresh = true;
+		}
+		catch (\Exception $e)
+		{
+			$this->iohandler->add_error_message($e->getMessage());
+			$this->iohandler->send_response(true);
+			$fail_cleanup = true;
+		}
+
+		if ($this->iohandler instanceof ajax_iohandler)
+		{
+			$this->iohandler->release_lock();
+		}
+
+		if ($install_finished)
+		{
+			// Send install finished message
+			$this->iohandler->set_progress('INSTALLER_FINISHED', $this->install_config->get_task_progress_count());
+			$this->iohandler->send_response(true);
+		}
+		else if ($send_refresh)
+		{
+			$this->iohandler->request_refresh();
+			$this->iohandler->send_response(true);
+		}
+
+		// Save install progress
+		try
+		{
+			if ($install_finished || $fail_cleanup)
+			{
+				$this->install_config->clean_up_config_file();
+				$this->cache->purge();
+
+				try
+				{
+					/** @var \phpbb\cache\driver\driver_interface $cache */
+					$cache = $this->container_factory->get('cache.driver');
+					$cache->purge();
+				}
+				catch (cannot_build_container_exception $e)
+				{
+					// Do not do anything, this just means there is no config.php yet
+				}
+			}
+			else
+			{
+				$this->install_config->save_config();
+			}
+		}
+		catch (installer_config_not_writable_exception $e)
+		{
+			// It is allowed to fail this test during requirements testing
+			$progress_data = $this->install_config->get_progress_data();
+
+			if ($progress_data['last_task_module_name'] !== 'installer.module.requirements_install')
+			{
+				$this->iohandler->add_error_message('INSTALLER_CONFIG_NOT_WRITABLE');
+			}
+		}
+	}
+
+	/**
+	 * Recover install progress
+	 *
+	 * @return string	Index of the next installer module to execute
+	 */
+	protected function recover_progress()
+	{
+		$progress_array = $this->install_config->get_progress_data();
+		return $progress_array['last_task_module_index'];
+	}
+}

phpbb/install/installer_configuration.php

@@ -0,0 +1,147 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class installer_configuration implements ConfigurationInterface
+{
+
+	/**
+	 * Generates the configuration tree builder.
+	 *
+	 * @return \Symfony\Component\Config\Definition\Builder\TreeBuilder The tree builder
+	 */
+	public function getConfigTreeBuilder()
+	{
+		$treeBuilder = new TreeBuilder();
+		$rootNode = $treeBuilder->root('installer');
+		$rootNode
+			->children()
+				->arrayNode('admin')
+					->children()
+						->scalarNode('name')->defaultValue('admin')->cannotBeEmpty()->end()
+						->scalarNode('password')->defaultValue('adminadmin')->cannotBeEmpty()->end()
+						->scalarNode('email')->defaultValue('admin@example.org')->cannotBeEmpty()->end()
+					->end()
+				->end()
+				->arrayNode('board')
+					->children()
+						->scalarNode('lang')
+							->defaultValue('en')
+							->cannotBeEmpty()
+							->end()
+						->scalarNode('name')
+							->defaultValue('My Board')
+							->cannotBeEmpty()
+							->end()
+						->scalarNode('description')
+						->defaultValue('My amazing new phpBB board')
+						->cannotBeEmpty()
+						->end()
+					->end()
+				->end()
+				->arrayNode('database')
+					->children()
+						->scalarNode('dbms')
+							->defaultValue('sqlite3')
+							->cannotBeEmpty()
+							->isRequired()
+							->end()
+						->scalarNode('dbhost')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbport')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbuser')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbpasswd')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbname')
+							->defaultValue(null)
+							->end()
+						->scalarNode('table_prefix')
+							->defaultValue('phpbb_')
+							->cannotBeEmpty()
+							->isRequired()
+							->end()
+					->end()
+				->end()
+				->arrayNode('email')
+					->canBeEnabled()
+					->addDefaultsIfNotSet()
+					->children()
+						->booleanNode('smtp_delivery')
+							->defaultValue(false)
+							->treatNullLike(false)
+							->end()
+						->scalarNode('smtp_host')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_port')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_auth')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_user')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_pass')
+							->defaultValue(null)
+							->end()
+					->end()
+				->end()
+				->arrayNode('server')
+					->children()
+						->booleanNode('cookie_secure')
+							->defaultValue(false)
+							->treatNullLike(false)
+							->end()
+						->scalarNode('server_protocol')
+							->defaultValue('http://')
+							->cannotBeEmpty()
+							->end()
+						->booleanNode('force_server_vars')
+							->defaultValue(false)
+							->treatNullLike(false)
+							->end()
+						->scalarNode('server_name')
+							->defaultValue('localhost')
+							->cannotBeEmpty()
+							->end()
+						->integerNode('server_port')
+							->defaultValue(80)
+							->min(1)
+							->cannotBeEmpty()
+							->end()
+						->scalarNode('script_path')
+							->defaultValue('/')
+							->cannotBeEmpty()
+							 ->end()
+					->end()
+				->end()
+				->arrayNode('extensions')
+					->prototype('scalar')->end()
+					->defaultValue([])
+				->end()
+			->end()
+		;
+		return $treeBuilder;
+	}
+}

phpbb/install/module/install_data/module.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_data;
+
+/**
+ * Installer module for recovering and installing default data installation
+ */
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'install');
+	}
+}

phpbb/install/module/install_data/task/add_bots.php

@@ -0,0 +1,263 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_data\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+class add_bots extends \phpbb\install\task_base
+{
+	/**
+	 * A list of the web-crawlers/bots we recognise by default
+	 *
+	 * Candidates but not included:
+	 * 'Accoona [Bot]'				'Accoona-AI-Agent/'
+	 * 'ASPseek [Crawler]'			'ASPseek/'
+	 * 'Boitho [Crawler]'			'boitho.com-dc/'
+	 * 'Bunnybot [Bot]'				'powered by www.buncat.de'
+	 * 'Cosmix [Bot]'				'cfetch/'
+	 * 'Crawler Search [Crawler]'	'.Crawler-Search.de'
+	 * 'Findexa [Crawler]'			'Findexa Crawler ('
+	 * 'GBSpider [Spider]'			'GBSpider v'
+	 * 'genie [Bot]'				'genieBot ('
+	 * 'Hogsearch [Bot]'			'oegp v. 1.3.0'
+	 * 'Insuranco [Bot]'			'InsurancoBot'
+	 * 'IRLbot [Bot]'				'http://irl.cs.tamu.edu/crawler'
+	 * 'ISC Systems [Bot]'			'ISC Systems iRc Search'
+	 * 'Jyxobot [Bot]'				'Jyxobot/'
+	 * 'Kraehe [Metasuche]'			'-DIE-KRAEHE- META-SEARCH-ENGINE/'
+	 * 'LinkWalker'					'LinkWalker'
+	 * 'MMSBot [Bot]'				'http://www.mmsweb.at/bot.html'
+	 * 'Naver [Bot]'				'nhnbot@naver.com)'
+	 * 'NetResearchServer'			'NetResearchServer/'
+	 * 'Nimble [Crawler]'			'NimbleCrawler'
+	 * 'Ocelli [Bot]'				'Ocelli/'
+	 * 'Onsearch [Bot]'				'onCHECK-Robot'
+	 * 'Orange [Spider]'			'OrangeSpider'
+	 * 'Sproose [Bot]'				'http://www.sproose.com/bot'
+	 * 'Susie [Sync]'				'!Susie (http://www.sync2it.com/susie)'
+	 * 'Tbot [Bot]'					'Tbot/'
+	 * 'Thumbshots [Capture]'		'thumbshots-de-Bot'
+	 * 'Vagabondo [Crawler]'		'http://webagent.wise-guys.nl/'
+	 * 'Walhello [Bot]'				'appie 1.1 (www.walhello.com)'
+	 * 'WissenOnline [Bot]'			'WissenOnline-Bot'
+	 * 'WWWeasel [Bot]'				'WWWeasel Robot v'
+	 * 'Xaldon [Spider]'			'Xaldon WebSpider'
+	 *
+	 * @var array
+	 */
+	protected $bot_list = array(
+		'AdsBot [Google]'			=> array('AdsBot-Google', ''),
+		'Alexa [Bot]'				=> array('ia_archiver', ''),
+		'Alta Vista [Bot]'			=> array('Scooter/', ''),
+		'Ask Jeeves [Bot]'			=> array('Ask Jeeves', ''),
+		'Baidu [Spider]'			=> array('Baiduspider', ''),
+		'Bing [Bot]'				=> array('bingbot/', ''),
+		'Exabot [Bot]'				=> array('Exabot', ''),
+		'FAST Enterprise [Crawler]'	=> array('FAST Enterprise Crawler', ''),
+		'FAST WebCrawler [Crawler]'	=> array('FAST-WebCrawler/', ''),
+		'Francis [Bot]'				=> array('http://www.neomo.de/', ''),
+		'Gigabot [Bot]'				=> array('Gigabot/', ''),
+		'Google Adsense [Bot]'		=> array('Mediapartners-Google', ''),
+		'Google Desktop'			=> array('Google Desktop', ''),
+		'Google Feedfetcher'		=> array('Feedfetcher-Google', ''),
+		'Google [Bot]'				=> array('Googlebot', ''),
+		'Heise IT-Markt [Crawler]'	=> array('heise-IT-Markt-Crawler', ''),
+		'Heritrix [Crawler]'		=> array('heritrix/1.', ''),
+		'IBM Research [Bot]'		=> array('ibm.com/cs/crawler', ''),
+		'ICCrawler - ICjobs'		=> array('ICCrawler - ICjobs', ''),
+		'ichiro [Crawler]'			=> array('ichiro/', ''),
+		'Majestic-12 [Bot]'			=> array('MJ12bot/', ''),
+		'Metager [Bot]'				=> array('MetagerBot/', ''),
+		'MSN NewsBlogs'				=> array('msnbot-NewsBlogs/', ''),
+		'MSN [Bot]'					=> array('msnbot/', ''),
+		'MSNbot Media'				=> array('msnbot-media/', ''),
+		'Nutch [Bot]'				=> array('http://lucene.apache.org/nutch/', ''),
+		'Online link [Validator]'	=> array('online link validator', ''),
+		'psbot [Picsearch]'			=> array('psbot/0', ''),
+		'Sensis [Crawler]'			=> array('Sensis Web Crawler', ''),
+		'SEO Crawler'				=> array('SEO search Crawler/', ''),
+		'Seoma [Crawler]'			=> array('Seoma [SEO Crawler]', ''),
+		'SEOSearch [Crawler]'		=> array('SEOsearch/', ''),
+		'Snappy [Bot]'				=> array('Snappy/1.1 ( http://www.urltrends.com/ )', ''),
+		'Steeler [Crawler]'			=> array('http://www.tkl.iis.u-tokyo.ac.jp/~crawler/', ''),
+		'Telekom [Bot]'				=> array('crawleradmin.t-info@telekom.de', ''),
+		'TurnitinBot [Bot]'			=> array('TurnitinBot/', ''),
+		'Voyager [Bot]'				=> array('voyager/', ''),
+		'W3 [Sitesearch]'			=> array('W3 SiteSearch Crawler', ''),
+		'W3C [Linkcheck]'			=> array('W3C-checklink/', ''),
+		'W3C [Validator]'			=> array('W3C_Validator', ''),
+		'YaCy [Bot]'				=> array('yacybot', ''),
+		'Yahoo MMCrawler [Bot]'		=> array('Yahoo-MMCrawler/', ''),
+		'Yahoo Slurp [Bot]'			=> array('Yahoo! DE Slurp', ''),
+		'Yahoo [Bot]'				=> array('Yahoo! Slurp', ''),
+		'YahooSeeker [Bot]'			=> array('YahooSeeker/', ''),
+	);
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$install_config		Installer's config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler			Input-output handler for the installer
+	 * @param \phpbb\install\helper\container_factory				$container			Installer's DI container
+	 * @param \phpbb\language\language								$language			Language provider
+	 * @param string												$phpbb_root_path	Relative path to phpBB root
+	 * @param string												$php_ext			PHP extension
+	 */
+	public function __construct(\phpbb\install\helper\config $install_config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								\phpbb\install\helper\container_factory $container,
+								\phpbb\language\language $language,
+								$phpbb_root_path,
+								$php_ext)
+	{
+		parent::__construct(true);
+
+		$this->db				= $container->get('dbal.conn');
+		$this->install_config	= $install_config;
+		$this->io_handler		= $iohandler;
+		$this->language			= $language;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$sql = 'SELECT group_id
+			FROM ' . GROUPS_TABLE . "
+			WHERE group_name = 'BOTS'";
+		$result = $this->db->sql_query($sql);
+		$group_id = (int) $this->db->sql_fetchfield('group_id');
+		$this->db->sql_freeresult($result);
+
+		if (!$group_id)
+		{
+			// If we reach this point then something has gone very wrong
+			$this->io_handler->add_error_message('NO_GROUP');
+		}
+
+		$i = $this->install_config->get('add_bot_index', 0);
+		$bot_list = array_slice($this->bot_list, $i);
+
+		foreach ($bot_list as $bot_name => $bot_ary)
+		{
+			$user_row = array(
+				'user_type'				=> USER_IGNORE,
+				'group_id'				=> $group_id,
+				'username'				=> $bot_name,
+				'user_regdate'			=> time(),
+				'user_password'			=> '',
+				'user_colour'			=> '9E8DA7',
+				'user_email'			=> '',
+				'user_lang'				=> $this->install_config->get('default_lang'),
+				'user_style'			=> 1,
+				'user_timezone'			=> 'UTC',
+				'user_dateformat'		=> $this->language->lang('default_dateformat'),
+				'user_allow_massemail'	=> 0,
+				'user_allow_pm'			=> 0,
+			);
+
+			if (!function_exists('user_add'))
+			{
+				include($this->phpbb_root_path . 'includes/functions_user.' . $this->php_ext);
+			}
+
+			$user_id = user_add($user_row);
+
+			if (!$user_id)
+			{
+				// If we can't insert this user then continue to the next one to avoid inconsistent data
+				$this->io_handler->add_error_message('CONV_ERROR_INSERT_BOT');
+
+				$i++;
+				continue;
+			}
+
+			$sql = 'INSERT INTO ' . BOTS_TABLE . ' ' . $this->db->sql_build_array('INSERT', array(
+				'bot_active'	=> 1,
+				'bot_name'		=> (string) $bot_name,
+				'user_id'		=> (int) $user_id,
+				'bot_agent'		=> (string) $bot_ary[0],
+				'bot_ip'		=> (string) $bot_ary[1],
+			));
+
+			$this->db->sql_query($sql);
+
+			$i++;
+
+			// Stop execution if resource limit is reached
+			if ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		$this->install_config->set('add_bot_index', $i);
+
+		if ($i < count($this->bot_list))
+		{
+			throw new resource_limit_reached_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_ADD_BOTS';
+	}
+}

phpbb/install/module/install_data/task/add_languages.php

@@ -0,0 +1,121 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_data\task;
+
+class add_languages extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\language\language_file_helper
+	 */
+	protected $language_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler			Installer's input-output handler
+	 * @param \phpbb\install\helper\container_factory				$container			Installer's DI container
+	 * @param \phpbb\language\language_file_helper					$language_helper	Language file helper service
+	 */
+	public function __construct(\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								\phpbb\install\helper\container_factory $container,
+								\phpbb\language\language_file_helper $language_helper)
+	{
+		$this->db				= $container->get('dbal.conn');
+		$this->iohandler		= $iohandler;
+		$this->language_helper	= $language_helper;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$languages = $this->language_helper->get_available_languages();
+		$installed_languages = array();
+
+		foreach ($languages as $lang_info)
+		{
+			$lang_pack = array(
+				'lang_iso'			=> $lang_info['iso'],
+				'lang_dir'			=> $lang_info['iso'],
+				'lang_english_name'	=> htmlspecialchars($lang_info['name']),
+				'lang_local_name'	=> htmlspecialchars($lang_info['local_name'], ENT_COMPAT, 'UTF-8'),
+				'lang_author'		=> htmlspecialchars($lang_info['author'], ENT_COMPAT, 'UTF-8'),
+			);
+
+			$this->db->sql_query('INSERT INTO ' . LANG_TABLE . ' ' . $this->db->sql_build_array('INSERT', $lang_pack));
+
+			$installed_languages[] = (int) $this->db->sql_nextid();
+			if ($this->db->get_sql_error_triggered())
+			{
+				$error = $this->db->sql_error($this->db->get_sql_error_sql());
+				$this->iohandler->add_error_message($error['message']);
+			}
+		}
+
+		$sql = 'SELECT * FROM ' . PROFILE_FIELDS_TABLE;
+		$result = $this->db->sql_query($sql);
+
+		$insert_buffer = new \phpbb\db\sql_insert_buffer($this->db, PROFILE_LANG_TABLE);
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			foreach ($installed_languages as $lang_id)
+			{
+				$insert_buffer->insert(array(
+					'field_id'				=> $row['field_id'],
+					'lang_id'				=> $lang_id,
+
+					// Remove phpbb_ from field name
+					'lang_name'				=> strtoupper(substr($row['field_name'], 6)),
+					'lang_explain'			=> '',
+					'lang_default_value'	=> '',
+				));
+			}
+		}
+
+		$this->db->sql_freeresult($result);
+
+		$insert_buffer->flush();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_ADD_LANGUAGES';
+	}
+}

phpbb/install/module/install_data/task/add_modules.php

@@ -0,0 +1,568 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_data\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\iohandler\iohandler_interface;
+
+class add_modules extends \phpbb\install\task_base
+{
+	/**
+	 * @var config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\extension\manager
+	 */
+	protected $extension_manager;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\module\module_manager
+	 */
+	protected $module_manager;
+
+	/**
+	 * Define the module structure so that we can populate the database without
+	 * needing to hard-code module_id values
+	 *
+	 * @var array
+	 */
+	protected $module_categories = array(
+		'acp' => array(
+			'ACP_CAT_GENERAL' => array(
+				'ACP_QUICK_ACCESS',
+				'ACP_BOARD_CONFIGURATION',
+				'ACP_CLIENT_COMMUNICATION',
+				'ACP_SERVER_CONFIGURATION',
+			),
+			'ACP_CAT_FORUMS' => array(
+				'ACP_MANAGE_FORUMS',
+				'ACP_FORUM_BASED_PERMISSIONS',
+			),
+			'ACP_CAT_POSTING' => array(
+				'ACP_MESSAGES',
+				'ACP_ATTACHMENTS',
+			),
+			'ACP_CAT_USERGROUP' => array(
+				'ACP_CAT_USERS',
+				'ACP_GROUPS',
+				'ACP_USER_SECURITY',
+			),
+			'ACP_CAT_PERMISSIONS' => array(
+				'ACP_GLOBAL_PERMISSIONS',
+				'ACP_FORUM_BASED_PERMISSIONS',
+				'ACP_PERMISSION_ROLES',
+				'ACP_PERMISSION_MASKS',
+			),
+			'ACP_CAT_CUSTOMISE' => array(
+				'ACP_STYLE_MANAGEMENT',
+				'ACP_EXTENSION_MANAGEMENT',
+				'ACP_LANGUAGE',
+			),
+			'ACP_CAT_MAINTENANCE' => array(
+				'ACP_FORUM_LOGS',
+				'ACP_CAT_DATABASE',
+			),
+			'ACP_CAT_SYSTEM' => array(
+				'ACP_AUTOMATION',
+				'ACP_GENERAL_TASKS',
+				'ACP_MODULE_MANAGEMENT',
+			),
+			'ACP_CAT_DOT_MODS' => null,
+		),
+		'mcp' => array(
+			'MCP_MAIN'		=> null,
+			'MCP_QUEUE'		=> null,
+			'MCP_REPORTS'	=> null,
+			'MCP_NOTES'		=> null,
+			'MCP_WARN'		=> null,
+			'MCP_LOGS'		=> null,
+			'MCP_BAN'		=> null,
+		),
+		'ucp' => array(
+			'UCP_MAIN'			=> null,
+			'UCP_PROFILE'		=> null,
+			'UCP_PREFS'			=> null,
+			'UCP_PM'			=> null,
+			'UCP_USERGROUPS'	=> null,
+			'UCP_ZEBRA'			=> null,
+		),
+	);
+
+	/**
+	 * @var array
+	 */
+	protected $module_categories_basenames = array(
+		'UCP_PM' => 'ucp_pm',
+	);
+
+	/**
+	 * @var array
+	 */
+	protected $module_extras = array(
+		'acp'	=> array(
+			'ACP_QUICK_ACCESS' => array(
+				'ACP_MANAGE_USERS',
+				'ACP_GROUPS_MANAGE',
+				'ACP_MANAGE_FORUMS',
+				'ACP_MOD_LOGS',
+				'ACP_BOTS',
+				'ACP_PHP_INFO',
+			),
+			'ACP_FORUM_BASED_PERMISSIONS' => array(
+				'ACP_FORUM_PERMISSIONS',
+				'ACP_FORUM_PERMISSIONS_COPY',
+				'ACP_FORUM_MODERATORS',
+				'ACP_USERS_FORUM_PERMISSIONS',
+				'ACP_GROUPS_FORUM_PERMISSIONS',
+			),
+		),
+	);
+
+	/**
+	 * Constructor
+	 *
+	 * @parma config				$config		Installer's config
+	 * @param iohandler_interface	$iohandler	Installer's input-output handler
+	 * @param container_factory		$container	Installer's DI container
+	 */
+	public function __construct(config $config, iohandler_interface $iohandler, container_factory $container)
+	{
+		$this->config				= $config;
+		$this->db					= $container->get('dbal.conn');
+		$this->extension_manager	= $container->get('ext.manager');
+		$this->iohandler			= $iohandler;
+		$this->module_manager		= $container->get('module.manager');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$module_classes = array('acp', 'mcp', 'ucp');
+		$total = count($module_classes);
+		$i = $this->config->get('module_class_index', 0);
+		$module_classes = array_slice($module_classes, $i);
+
+		foreach ($module_classes as $module_class)
+		{
+			$categories = $this->config->get('module_categories_array', array());
+
+			$k = $this->config->get('module_categories_index', 0);
+			$module_categories = array_slice($this->module_categories[$module_class], $k);
+			$timed_out = false;
+
+			foreach ($module_categories as $cat_name => $subs)
+			{
+				// Check if this sub-category has a basename. If it has, use it.
+				$basename = (isset($this->module_categories_basenames[$cat_name])) ? $this->module_categories_basenames[$cat_name] : '';
+
+				$module_data = array(
+					'module_basename'	=> $basename,
+					'module_enabled'	=> 1,
+					'module_display'	=> 1,
+					'parent_id'			=> 0,
+					'module_class'		=> $module_class,
+					'module_langname'	=> $cat_name,
+					'module_mode'		=> '',
+					'module_auth'		=> '',
+				);
+
+				$this->module_manager->update_module_data($module_data);
+
+				// Check for last sql error happened
+				if ($this->db->get_sql_error_triggered())
+				{
+					$error = $this->db->sql_error($this->db->get_sql_error_sql());
+					$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+				}
+
+				$categories[$cat_name]['id'] = (int) $module_data['module_id'];
+				$categories[$cat_name]['parent_id'] = 0;
+
+				if (is_array($subs))
+				{
+					foreach ($subs as $level2_name)
+					{
+						// Check if this sub-category has a basename. If it has, use it.
+						$basename = (isset($this->module_categories_basenames[$level2_name])) ? $this->module_categories_basenames[$level2_name] : '';
+
+						$module_data = array(
+							'module_basename'	=> $basename,
+							'module_enabled'	=> 1,
+							'module_display'	=> 1,
+							'parent_id'			=> (int) $categories[$cat_name]['id'],
+							'module_class'		=> $module_class,
+							'module_langname'	=> $level2_name,
+							'module_mode'		=> '',
+							'module_auth'		=> '',
+						);
+
+						$this->module_manager->update_module_data($module_data);
+
+						// Check for last sql error happened
+						if ($this->db->get_sql_error_triggered())
+						{
+							$error = $this->db->sql_error($this->db->get_sql_error_sql());
+							$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+						}
+
+						$categories[$level2_name]['id'] = (int) $module_data['module_id'];
+						$categories[$level2_name]['parent_id'] = (int) $categories[$cat_name]['id'];
+					}
+				}
+
+				$k++;
+
+				// Stop execution if resource limit is reached
+				if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+				{
+					$timed_out = true;
+					break;
+				}
+			}
+
+			$this->config->set('module_categories_array', $categories);
+			$this->config->set('module_categories_index', $k);
+
+			if ($timed_out)
+			{
+				throw new resource_limit_reached_exception();
+			}
+
+			// Get the modules we want to add... returned sorted by name
+			$module_info = $this->module_manager->get_module_infos($module_class);
+
+			$k = $this->config->get('module_info_index', 0);
+			$module_info = array_slice($module_info, $k);
+
+			foreach ($module_info as $module_basename => $fileinfo)
+			{
+				foreach ($fileinfo['modes'] as $module_mode => $row)
+				{
+					foreach ($row['cat'] as $cat_name)
+					{
+						if (!isset($categories[$cat_name]))
+						{
+							continue;
+						}
+
+						$module_data = array(
+							'module_basename'	=> $module_basename,
+							'module_enabled'	=> 1,
+							'module_display'	=> (isset($row['display'])) ? (int) $row['display'] : 1,
+							'parent_id'			=> (int) $categories[$cat_name]['id'],
+							'module_class'		=> $module_class,
+							'module_langname'	=> $row['title'],
+							'module_mode'		=> $module_mode,
+							'module_auth'		=> $row['auth'],
+						);
+
+						$this->module_manager->update_module_data($module_data);
+
+						// Check for last sql error happened
+						if ($this->db->get_sql_error_triggered())
+						{
+							$error = $this->db->sql_error($this->db->get_sql_error_sql());
+							$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+						}
+					}
+				}
+
+				$k++;
+
+				// Stop execution if resource limit is reached
+				if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+				{
+					$timed_out = true;
+					break;
+				}
+			}
+
+			$this->config->set('module_info_index', $k);
+
+			// Stop execution if resource limit is reached
+			if ($timed_out)
+			{
+				throw new resource_limit_reached_exception();
+			}
+
+			// Move some of the modules around since the code above will put them in the wrong place
+			if (!$this->config->get('modules_ordered', false))
+			{
+				$this->order_modules($module_class);
+				$this->config->set('modules_ordered', true);
+
+				// Stop execution if resource limit is reached
+				if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+				{
+					throw new resource_limit_reached_exception();
+				}
+			}
+
+			// And now for the special ones
+			// (these are modules which appear in multiple categories and thus get added manually
+			// to some for more control)
+			if (isset($this->module_extras[$module_class]))
+			{
+				$this->add_module_extras($module_class);
+			}
+
+			$this->module_manager->remove_cache_file($module_class);
+
+			$i++;
+
+			$this->config->set('module_class_index', $i);
+			$this->config->set('module_categories_index', 0);
+			$this->config->set('module_info_index', 0);
+			$this->config->set('added_extra_modules', false);
+			$this->config->set('modules_ordered', false);
+			$this->config->set('module_categories_array', array());
+
+			// Stop execution if resource limit is reached
+			if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		if ($i < $total)
+		{
+			throw new resource_limit_reached_exception();
+		}
+	}
+
+	/**
+	 * Move modules to their correct place
+	 *
+	 * @param string	$module_class
+	 */
+	protected function order_modules($module_class)
+	{
+		if ($module_class == 'acp')
+		{
+			// Move main module 4 up...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'acp_main'
+					AND module_class = 'acp'
+					AND module_mode = 'main'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'acp', 'move_up', 4);
+
+			// Move permissions intro screen module 4 up...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'acp_permissions'
+					AND module_class = 'acp'
+					AND module_mode = 'intro'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'acp', 'move_up', 4);
+
+			// Move manage users screen module 5 up...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'acp_users'
+					AND module_class = 'acp'
+					AND module_mode = 'overview'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'acp', 'move_up', 5);
+
+			// Move extension management module 1 up...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_langname = 'ACP_EXTENSION_MANAGEMENT'
+					AND module_class = 'acp'
+					AND module_mode = ''
+					AND module_basename = ''";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'acp', 'move_up', 1);
+		}
+
+		if ($module_class == 'mcp')
+		{
+			// Move pm report details module 3 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'mcp_pm_reports'
+					AND module_class = 'mcp'
+					AND module_mode = 'pm_report_details'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'mcp', 'move_down', 3);
+
+			// Move closed pm reports module 3 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'mcp_pm_reports'
+					AND module_class = 'mcp'
+					AND module_mode = 'pm_reports_closed'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'mcp', 'move_down', 3);
+
+			// Move open pm reports module 3 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'mcp_pm_reports'
+					AND module_class = 'mcp'
+					AND module_mode = 'pm_reports'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'mcp', 'move_down', 3);
+		}
+
+		if ($module_class == 'ucp')
+		{
+			// Move attachment module 4 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'ucp_attachments'
+					AND module_class = 'ucp'
+					AND module_mode = 'attachments'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'ucp', 'move_down', 4);
+
+			// Move notification options module 4 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'ucp_notifications'
+					AND module_class = 'ucp'
+					AND module_mode = 'notification_options'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'ucp', 'move_down', 4);
+
+			// Move OAuth module 5 down...
+			$sql = 'SELECT *
+				FROM ' . MODULES_TABLE . "
+				WHERE module_basename = 'ucp_auth_link'
+					AND module_class = 'ucp'
+					AND module_mode = 'auth_link'";
+			$result = $this->db->sql_query($sql);
+			$row = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			$this->module_manager->move_module_by($row, 'ucp', 'move_down', 5);
+		}
+	}
+
+	/**
+	 * Add extra modules
+	 *
+	 * @param string	$module_class
+	 */
+	protected function add_module_extras($module_class)
+	{
+		foreach ($this->module_extras[$module_class] as $cat_name => $mods)
+		{
+			$sql = 'SELECT module_id, left_id, right_id
+				FROM ' . MODULES_TABLE . "
+				WHERE module_langname = '" . $this->db->sql_escape($cat_name) . "'
+					AND module_class = '" . $this->db->sql_escape($module_class) . "'";
+			$result = $this->db->sql_query_limit($sql, 1);
+			$row2 = $this->db->sql_fetchrow($result);
+			$this->db->sql_freeresult($result);
+
+			foreach ($mods as $mod_name)
+			{
+				$sql = 'SELECT *
+					FROM ' . MODULES_TABLE . "
+					WHERE module_langname = '" . $this->db->sql_escape($mod_name) . "'
+						AND module_class = '" . $this->db->sql_escape($module_class) . "'
+						AND module_basename <> ''";
+				$result = $this->db->sql_query_limit($sql, 1);
+				$row = $this->db->sql_fetchrow($result);
+				$this->db->sql_freeresult($result);
+
+				$module_data = array(
+					'module_basename'	=> $row['module_basename'],
+					'module_enabled'	=> (int) $row['module_enabled'],
+					'module_display'	=> (int) $row['module_display'],
+					'parent_id'			=> (int) $row2['module_id'],
+					'module_class'		=> $row['module_class'],
+					'module_langname'	=> $row['module_langname'],
+					'module_mode'		=> $row['module_mode'],
+					'module_auth'		=> $row['module_auth'],
+				);
+
+				$this->module_manager->update_module_data($module_data);
+
+				// Check for last sql error happened
+				if ($this->db->get_sql_error_triggered())
+				{
+					$error = $this->db->sql_error($this->db->get_sql_error_sql());
+					$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+				}
+			}
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_ADD_MODULES';
+	}
+}

phpbb/install/module/install_data/task/create_search_index.php

@@ -0,0 +1,134 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_data\task;
+
+use phpbb\auth\auth;
+use phpbb\db\driver\driver_interface;
+use phpbb\event\dispatcher;
+use phpbb\config\config;
+use phpbb\install\helper\container_factory;
+use phpbb\language\language;
+use phpbb\search\fulltext_native;
+use phpbb\user;
+
+class create_search_index extends \phpbb\install\task_base
+{
+	/**
+	 * @var auth
+	 */
+	protected $auth;
+
+	/**
+	 * @var config
+	 */
+	protected $config;
+
+	/**
+	 * @var driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var dispatcher
+	 */
+	protected $phpbb_dispatcher;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var user
+	 */
+	protected $user;
+
+	/**
+	 * @var string phpBB root path
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string PHP file extension
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$config				phpBB config
+	 * @param container_factory		$container			Installer's DI container
+	 * @param string				$phpbb_root_path	phpBB root path
+	 * @param string				$php_ext			PHP file extension
+	 */
+	public function __construct(config $config, container_factory $container,
+								$phpbb_root_path, $php_ext)
+	{
+		$this->auth				= $container->get('auth');
+		$this->config			= $config;
+		$this->db				= $container->get('dbal.conn');
+		$this->language			= $container->get('language');
+		$this->phpbb_dispatcher = $container->get('dispatcher');
+		$this->user 			= $container->get('user');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Make sure fulltext native load update is set
+		$this->config->set('fulltext_native_load_upd', 1);
+
+		$error = false;
+		$search = new fulltext_native(
+			$error,
+			$this->phpbb_root_path,
+			$this->php_ext,
+			$this->auth,
+			$this->config,
+			$this->db,
+			$this->user,
+			$this->phpbb_dispatcher
+		);
+
+		$sql = 'SELECT post_id, post_subject, post_text, poster_id, forum_id
+			FROM ' . POSTS_TABLE;
+		$result = $this->db->sql_query($sql);
+
+		while ($row = $this->db->sql_fetchrow($result))
+		{
+			$search->index('post', $row['post_id'], $row['post_text'], $row['post_subject'], $row['poster_id'], $row['forum_id']);
+		}
+		$this->db->sql_freeresult($result);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_CREATE_SEARCH_INDEX';
+	}
+}

phpbb/install/module/install_database/module.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database;
+
+/**
+ * Installer module for database installation
+ */
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'install');
+	}
+}

phpbb/install/module/install_database/task/add_config_settings.php

@@ -0,0 +1,368 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Create database schema
+ */
+class add_config_settings extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var \phpbb\passwords\manager
+	 */
+	protected $password_manager;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $config_table;
+
+	/**
+	 * @var string
+	 */
+	protected $user_table;
+
+	/**
+	 * @var string
+	 */
+	protected $topics_table;
+
+	/**
+	 * @var string
+	 */
+	protected $forums_table;
+
+	/**
+	 * @var string
+	 */
+	protected $posts_table;
+
+	/**
+	 * @var string
+	 */
+	protected $moderator_cache_table;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem			Filesystem service
+	 * @param \phpbb\install\helper\config							$install_config		Installer's config helper
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler			Installer's input-output handler
+	 * @param \phpbb\install\helper\container_factory				$container			Installer's DI container
+	 * @param \phpbb\language\language								$language			Language service
+	 * @param string												$phpbb_root_path	Path to phpBB's root
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem,
+								\phpbb\install\helper\config $install_config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								\phpbb\install\helper\container_factory $container,
+								\phpbb\language\language $language,
+								$phpbb_root_path)
+	{
+		$this->db				= $container->get('dbal.conn');
+		$this->filesystem		= $filesystem;
+		$this->install_config	= $install_config;
+		$this->iohandler		= $iohandler;
+		$this->language			= $language;
+		$this->password_manager	= $container->get('passwords.manager');
+		$this->phpbb_root_path	= $phpbb_root_path;
+
+		// Table names
+		$this->config_table				= $container->get_parameter('tables.config');
+		$this->forums_table				= $container->get_parameter('tables.forums');
+		$this->topics_table				= $container->get_parameter('tables.topics');
+		$this->user_table				= $container->get_parameter('tables.users');
+		$this->moderator_cache_table	= $container->get_parameter('tables.moderator_cache');
+		$this->posts_table				= $container->get_parameter('tables.posts');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$server_name	= $this->install_config->get('server_name');
+		$current_time 	= time();
+		$user_ip		= phpbb_ip_normalise($this->iohandler->get_server_variable('REMOTE_ADDR'));
+		$user_ip		= ($user_ip === false) ? '' : $user_ip;
+		$referer		= $this->iohandler->get_server_variable('REFERER');
+
+		// Calculate cookie domain
+		$cookie_domain = $server_name;
+
+		if (strpos($cookie_domain, 'www.') === 0)
+		{
+			$cookie_domain = substr($cookie_domain, 3);
+		}
+
+		// Set default config and post data, this applies to all DB's
+		$sql_ary = array(
+			'INSERT INTO ' . $this->config_table . " (config_name, config_value)
+				VALUES ('board_startdate', '$current_time')",
+
+			'INSERT INTO ' . $this->config_table . " (config_name, config_value)
+				VALUES ('default_lang', '" . $this->db->sql_escape($this->install_config->get('default_lang')) . "')",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('server_name')) . "'
+				WHERE config_name = 'server_name'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('server_port')) . "'
+				WHERE config_name = 'server_port'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('board_email')) . "'
+				WHERE config_name = 'board_email'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('board_email')) . "'
+				WHERE config_name = 'board_contact'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($cookie_domain) . "'
+				WHERE config_name = 'cookie_domain'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->language->lang('default_dateformat')) . "'
+				WHERE config_name = 'default_dateformat'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('email_enable')) . "'
+				WHERE config_name = 'email_enable'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_delivery')) . "'
+				WHERE config_name = 'smtp_delivery'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_host')) . "'
+				WHERE config_name = 'smtp_host'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_port')) . "'
+				WHERE config_name = 'smtp_port'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_auth')) . "'
+				WHERE config_name = 'smtp_auth_method'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_user')) . "'
+				WHERE config_name = 'smtp_username'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('smtp_pass')) . "'
+				WHERE config_name = 'smtp_password'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('cookie_secure')) . "'
+				WHERE config_name = 'cookie_secure'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('force_server_vars')) . "'
+				WHERE config_name = 'force_server_vars'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('script_path')) . "'
+				WHERE config_name = 'script_path'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('server_protocol')) . "'
+				WHERE config_name = 'server_protocol'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "'
+				WHERE config_name = 'newest_username'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . md5(mt_rand()) . "'
+				WHERE config_name = 'avatar_salt'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . md5(mt_rand()) . "'
+				WHERE config_name = 'plupload_salt'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('board_name')) . "'
+				WHERE config_name = 'sitename'",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->install_config->get('board_description')) . "'
+				WHERE config_name = 'site_desc'",
+
+			'UPDATE ' . $this->user_table . "
+				SET username = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "',
+					user_password='" . $this->password_manager->hash($this->install_config->get('admin_passwd')) . "',
+					user_ip = '" . $this->db->sql_escape($user_ip) . "',
+					user_lang = '" . $this->db->sql_escape($this->install_config->get('user_language', 'en')) . "',
+					user_email='" . $this->db->sql_escape($this->install_config->get('board_email')) . "',
+					user_dateformat='" . $this->db->sql_escape($this->language->lang('default_dateformat')) . "',
+					user_email_hash = " . $this->db->sql_escape(phpbb_email_hash($this->install_config->get('board_email'))) . ",
+					username_clean = '" . $this->db->sql_escape(utf8_clean_string($this->install_config->get('admin_name'))) . "'
+				WHERE username = 'Admin'",
+
+			'UPDATE ' . $this->moderator_cache_table . "
+				SET username = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "'
+				WHERE username = 'Admin'",
+
+			'UPDATE ' . $this->forums_table . "
+				SET forum_last_poster_name = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "'
+				WHERE forum_last_poster_name = 'Admin'",
+
+			'UPDATE ' . $this->topics_table . "
+				SET topic_first_poster_name = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "',
+				topic_last_poster_name = '" . $this->db->sql_escape($this->install_config->get('admin_name')) . "'
+				WHERE topic_first_poster_name = 'Admin'
+					OR topic_last_poster_name = 'Admin'",
+
+			'UPDATE ' . $this->user_table . "
+				SET user_regdate = $current_time",
+
+			'UPDATE ' . $this->posts_table . "
+				SET post_time = $current_time, poster_ip = '" . $this->db->sql_escape($user_ip) . "'",
+
+			'UPDATE ' . $this->topics_table . "
+				SET topic_time = $current_time, topic_last_post_time = $current_time",
+
+			'UPDATE ' . $this->forums_table . "
+				SET forum_last_post_time = $current_time",
+
+			'UPDATE ' . $this->config_table . "
+				SET config_value = '" . $this->db->sql_escape($this->db->sql_server_info(true)) . "'
+				WHERE config_name = 'dbms_version'",
+		);
+
+		if (@extension_loaded('gd'))
+		{
+			$sql_ary[] = 'UPDATE ' . $this->config_table . "
+				SET config_value = 'core.captcha.plugins.gd'
+				WHERE config_name = 'captcha_plugin'";
+
+			$sql_ary[] = 'UPDATE ' . $this->config_table . "
+				SET config_value = '1'
+				WHERE config_name = 'captcha_gd'";
+		}
+
+		$ref = substr($referer, strpos($referer, '://') + 3);
+		if (!(stripos($ref, $server_name) === 0))
+		{
+			$sql_ary[] = 'UPDATE ' . $this->config_table . "
+				SET config_value = '0'
+				WHERE config_name = 'referer_validation'";
+		}
+
+		// We set a (semi-)unique cookie name to bypass login issues related to the cookie name.
+		$cookie_name = 'phpbb3_';
+		$rand_str = md5(mt_rand());
+		$rand_str = str_replace('0', 'z', base_convert($rand_str, 16, 35));
+		$rand_str = substr($rand_str, 0, 5);
+		$cookie_name .= strtolower($rand_str);
+
+		$sql_ary[] = 'UPDATE ' . $this->config_table . "
+			SET config_value = '" . $this->db->sql_escape($cookie_name) . "'
+			WHERE config_name = 'cookie_name'";
+
+		// Disable avatars if upload directory is not writable
+		if (!$this->filesystem->is_writable($this->phpbb_root_path . 'images/avatars/upload/'))
+		{
+			$sql_ary[] = 'UPDATE ' . $this->config_table . "
+				SET config_value = '0'
+				WHERE config_name = 'allow_avatar'";
+
+			$sql_ary[] = 'UPDATE ' . $this->config_table . "
+				SET config_value = '0'
+				WHERE config_name = 'allow_avatar_upload'";
+		}
+
+		$i = $this->install_config->get('add_config_settings_index', 0);
+		$total = count($sql_ary);
+		$sql_ary = array_slice($sql_ary, $i);
+
+		foreach ($sql_ary as $sql)
+		{
+			if (!$this->db->sql_query($sql))
+			{
+				$error = $this->db->sql_error($this->db->get_sql_error_sql());
+				$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+			}
+
+			$i++;
+
+			// Stop execution if resource limit is reached
+			if ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		if ($i < $total)
+		{
+			$this->install_config->set('add_config_settings_index', $i);
+			throw new resource_limit_reached_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_ADD_CONFIG_SETTINGS';
+	}
+}

phpbb/install/module/install_database/task/add_default_data.php

@@ -0,0 +1,184 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Create database schema
+ */
+class add_default_data extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $database_helper;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\database						$db_helper	Installer's database helper
+	 * @param \phpbb\install\helper\config							$config		Installer config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler	Installer's input-output handler
+	 * @param \phpbb\install\helper\container_factory				$container	Installer's DI container
+	 * @param \phpbb\language\language								$language	Language service
+	 * @param string												$root_path	Root path of phpBB
+	 */
+	public function __construct(\phpbb\install\helper\database $db_helper,
+								\phpbb\install\helper\config $config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								\phpbb\install\helper\container_factory $container,
+								\phpbb\language\language $language,
+								$root_path)
+	{
+		$this->db				= $container->get('dbal.conn.driver');
+		$this->database_helper	= $db_helper;
+		$this->config			= $config;
+		$this->iohandler		= $iohandler;
+		$this->language			= $language;
+		$this->phpbb_root_path	= $root_path;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$table_prefix = $this->config->get('table_prefix');
+		$dbms = $this->config->get('dbms');
+		$dbms_info = $this->database_helper->get_available_dbms($dbms);
+
+		// Get schema data from file
+		$sql_query = @file_get_contents($this->phpbb_root_path . 'install/schemas/schema_data.sql');
+
+		// Clean up SQL
+		$sql_query = $this->replace_dbms_specific_sql($sql_query);
+		$sql_query = preg_replace('# phpbb_([^\s]*) #i', ' ' . $table_prefix . '\1 ', $sql_query);
+		$sql_query = preg_replace_callback('#\{L_([A-Z0-9\-_]*)\}#s', array($this, 'lang_replace_callback'), $sql_query);
+		$sql_query = $this->database_helper->remove_comments($sql_query);
+		$sql_query = $this->database_helper->split_sql_file($sql_query, $dbms_info[$dbms]['DELIM']);
+
+		$i = $this->config->get('add_default_data_index', 0);
+		$total = count($sql_query);
+		$sql_query = array_slice($sql_query, $i);
+
+		foreach ($sql_query as $sql)
+		{
+			if (!$this->db->sql_query($sql))
+			{
+				$error = $this->db->sql_error($this->db->get_sql_error_sql());
+				$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+			}
+
+			$i++;
+
+			// Stop execution if resource limit is reached
+			if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		$this->config->set('add_default_data_index', $i);
+
+		if ($i < $total)
+		{
+			throw new resource_limit_reached_exception();
+		}
+	}
+
+	/**
+	 * Process DB specific SQL
+	 *
+	 * @return string
+	 */
+	protected function replace_dbms_specific_sql($query)
+	{
+		if ($this->db instanceof \phpbb\db\driver\mssql_base)
+		{
+			$query = preg_replace('#\# MSSQL IDENTITY (phpbb_[a-z_]+) (ON|OFF) \##s', 'SET IDENTITY_INSERT \1 \2;', $query);
+		}
+		else if ($this->db instanceof \phpbb\db\driver\postgres)
+		{
+			$query = preg_replace('#\# POSTGRES (BEGIN|COMMIT) \##s', '\1; ', $query);
+		}
+		else if ($this->db instanceof \phpbb\db\driver\mysql_base)
+		{
+			$query = str_replace('\\', '\\\\', $query);
+		}
+
+		return $query;
+	}
+
+	/**
+	 * Callback function for language replacing
+	 *
+	 * @param array	$matches
+	 * @return string
+	 */
+	public function lang_replace_callback($matches)
+	{
+		if (!empty($matches[1]))
+		{
+			return $this->db->sql_escape($this->language->lang($matches[1]));
+		}
+
+		return '';
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_ADD_DEFAULT_DATA';
+	}
+}

phpbb/install/module/install_database/task/add_tables.php

@@ -0,0 +1,151 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Create tables
+ */
+class add_tables extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\db\tools\tools_interface
+	 */
+	protected $db_tools;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var string
+	 */
+	protected $schema_file_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config				$config
+	 * @param \phpbb\install\helper\database			$db_helper
+	 * @param \phpbb\filesystem\filesystem_interface	$filesystem
+	 * @param string									$phpbb_root_path
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\database $db_helper,
+								\phpbb\filesystem\filesystem_interface $filesystem,
+								$phpbb_root_path)
+	{
+		$dbms = $db_helper->get_available_dbms($config->get('dbms'));
+		$dbms = $dbms[$config->get('dbms')]['DRIVER'];
+		$factory = new \phpbb\db\tools\factory();
+
+		$this->db				= new $dbms();
+		$this->db->sql_connect(
+			$config->get('dbhost'),
+			$config->get('dbuser'),
+			$config->get('dbpasswd'),
+			$config->get('dbname'),
+			$config->get('dbport'),
+			false,
+			false
+		);
+
+		$this->config			= $config;
+		$this->db_tools			= $factory->get($this->db);
+		$this->filesystem		= $filesystem;
+		$this->schema_file_path	= $phpbb_root_path . 'store/schema.json';
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$table_prefix = $this->config->get('table_prefix');
+		$change_prefix = $this->config->get('change_table_prefix', true);
+
+		if (!defined('CONFIG_TABLE'))
+		{
+			// CONFIG_TABLE is required by sql_create_index() to check the
+			// length of index names. However table_prefix is not defined
+			// here yet, so we need to create the constant ourselves.
+			define('CONFIG_TABLE', $table_prefix . 'config');
+		}
+
+		$db_table_schema = @file_get_contents($this->schema_file_path);
+		$db_table_schema = json_decode($db_table_schema, true);
+		$total = count($db_table_schema);
+		$i = $this->config->get('add_table_index', 0);
+		$db_table_schema = array_slice($db_table_schema, $i);
+
+		foreach ($db_table_schema as $table_name => $table_data)
+		{
+			$i++;
+
+			$this->db_tools->sql_create_table(
+				( ($change_prefix) ? ($table_prefix . substr($table_name, 6)) : $table_name ),
+				$table_data
+			);
+
+			// Stop execution if resource limit is reached
+			if ($this->config->get_time_remaining() <= 0 || $this->config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		$this->config->set('add_table_index', $i);
+
+		if ($i < $total)
+		{
+			throw new resource_limit_reached_exception();
+		}
+		else
+		{
+			@unlink($this->schema_file_path);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_CREATE_TABLES';
+	}
+}

phpbb/install/module/install_database/task/create_schema.php

@@ -0,0 +1,234 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Create database schema
+ */
+class create_schema extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\db\tools\tools_interface
+	 */
+	protected $db_tools;
+
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $database_helper;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config				Installer's config provider
+	 * @param \phpbb\install\helper\database						$db_helper			Installer's database helper
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem			Filesystem service
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler			Installer's input-output handler
+	 * @param string												$phpbb_root_path	Path phpBB's root
+	 * @param string												$php_ext			Extension of PHP files
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\database $db_helper,
+								\phpbb\filesystem\filesystem_interface $filesystem,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								$phpbb_root_path,
+								$php_ext)
+	{
+		$dbms = $db_helper->get_available_dbms($config->get('dbms'));
+		$dbms = $dbms[$config->get('dbms')]['DRIVER'];
+		$factory = new \phpbb\db\tools\factory();
+
+		$this->db				= new $dbms();
+		$this->db->sql_connect(
+			$config->get('dbhost'),
+			$config->get('dbuser'),
+			$config->get('dbpasswd'),
+			$config->get('dbname'),
+			$config->get('dbport'),
+			false,
+			false
+		);
+
+		$this->config			= $config;
+		$this->db_tools			= $factory->get($this->db);
+		$this->database_helper	= $db_helper;
+		$this->filesystem		= $filesystem;
+		$this->iohandler		= $iohandler;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// As this task may take a large amount of time to complete refreshing the page might be necessary for some
+		// server configurations with limited resources
+		if (!$this->config->get('pre_schema_forced_refresh'))
+		{
+			if ($this->config->get_time_remaining() < 5)
+			{
+				$this->config->set('pre_schema_forced_refresh', true);
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		$this->db->sql_return_on_error(true);
+
+		$dbms = $this->config->get('dbms');
+		$dbms_info = $this->database_helper->get_available_dbms($dbms);
+		$schema_name = $dbms_info[$dbms]['SCHEMA'];
+		$delimiter = $dbms_info[$dbms]['DELIM'];
+		$table_prefix = $this->config->get('table_prefix');
+
+		if ($dbms === 'mysql')
+		{
+			if (version_compare($this->db->sql_server_info(true), '4.1.3', '>='))
+			{
+				$schema_name .= '_41';
+			}
+			else
+			{
+				$schema_name .= '_40';
+			}
+		}
+
+		$db_schema_path = $this->phpbb_root_path . 'install/schemas/' . $schema_name . '_schema.sql';
+
+		// Load database vendor specific code if there is any
+		if ($this->filesystem->exists($db_schema_path))
+		{
+			$sql_query = @file_get_contents($db_schema_path);
+			$sql_query = preg_replace('#phpbb_#i', $table_prefix, $sql_query);
+			$sql_query = $this->database_helper->remove_comments($sql_query);
+			$sql_query = $this->database_helper->split_sql_file($sql_query, $delimiter);
+
+			foreach ($sql_query as $sql)
+			{
+				if (!$this->db->sql_query($sql))
+				{
+					$error = $this->db->sql_error($this->db->get_sql_error_sql());
+					$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+				}
+			}
+
+			unset($sql_query);
+		}
+
+		$change_prefix = false;
+
+		// Generate database schema
+		if ($this->filesystem->exists($this->phpbb_root_path . 'install/schemas/schema.json'))
+		{
+			$db_table_schema = @file_get_contents($this->phpbb_root_path . 'install/schemas/schema.json');
+			$db_table_schema = json_decode($db_table_schema, true);
+			$change_prefix = true;
+		}
+		else
+		{
+			global $table_prefix;
+
+			$table_prefix = $this->config->get('table_prefix');
+
+			if (!defined('CONFIG_TABLE'))
+			{
+				// We need to include the constants file for the table constants
+				// when we generate the schema from the migration files.
+				include ($this->phpbb_root_path . 'includes/constants.' . $this->php_ext);
+			}
+
+			$finder = new \phpbb\finder($this->filesystem, $this->phpbb_root_path, null, $this->php_ext);
+			$migrator_classes = $finder->core_path('phpbb/db/migration/data/')->get_classes();
+			$factory = new \phpbb\db\tools\factory();
+			$db_tools = $factory->get($this->db, true);
+			$schema_generator = new \phpbb\db\migration\schema_generator(
+				$migrator_classes,
+				new \phpbb\config\config(array()),
+				$this->db,
+				$db_tools,
+				$this->phpbb_root_path,
+				$this->php_ext,
+				$table_prefix
+			);
+			$db_table_schema = $schema_generator->get_schema();
+		}
+
+		if (!defined('CONFIG_TABLE'))
+		{
+			// CONFIG_TABLE is required by sql_create_index() to check the
+			// length of index names. However table_prefix is not defined
+			// here yet, so we need to create the constant ourselves.
+			define('CONFIG_TABLE', $table_prefix . 'config');
+		}
+
+		foreach ($db_table_schema as $table_name => $table_data)
+		{
+			$this->db_tools->sql_create_table(
+				( ($change_prefix) ? ($table_prefix . substr($table_name, 6)) : $table_name ),
+				$table_data
+			);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_CREATE_DATABASE_SCHEMA';
+	}
+}

phpbb/install/module/install_database/task/create_schema_file.php

@@ -0,0 +1,164 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Create database schema
+ */
+class create_schema_file extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config				Installer's config provider
+	 * @param \phpbb\install\helper\database						$db_helper			Installer's database helper
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem			Filesystem service
+	 * @param string												$phpbb_root_path	Path phpBB's root
+	 * @param string												$php_ext			Extension of PHP files
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\database $db_helper,
+								\phpbb\filesystem\filesystem_interface $filesystem,
+								$phpbb_root_path,
+								$php_ext)
+	{
+		$dbms = $db_helper->get_available_dbms($config->get('dbms'));
+		$dbms = $dbms[$config->get('dbms')]['DRIVER'];
+
+		$this->db				= new $dbms();
+		$this->db->sql_connect(
+			$config->get('dbhost'),
+			$config->get('dbuser'),
+			$config->get('dbpasswd'),
+			$config->get('dbname'),
+			$config->get('dbport'),
+			false,
+			false
+		);
+
+		$this->config			= $config;
+		$this->filesystem		= $filesystem;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Generate database schema
+		if ($this->filesystem->exists($this->phpbb_root_path . 'install/schemas/schema.json'))
+		{
+			$db_table_schema = @file_get_contents($this->phpbb_root_path . 'install/schemas/schema.json');
+			$this->config->set('change_table_prefix', true);
+		}
+		else
+		{
+			global $table_prefix;
+
+			// As this task may take a large amount of time to complete refreshing the page might be necessary for some
+			// server configurations with limited resources
+			if (!$this->config->get('pre_schema_forced_refresh', false))
+			{
+				if ($this->config->get_time_remaining() < 5)
+				{
+					$this->config->set('pre_schema_forced_refresh', true);
+					throw new resource_limit_reached_exception();
+				}
+			}
+
+			$table_prefix = $this->config->get('table_prefix');
+
+			if (!defined('CONFIG_TABLE'))
+			{
+				// We need to include the constants file for the table constants
+				// when we generate the schema from the migration files.
+				include ($this->phpbb_root_path . 'includes/constants.' . $this->php_ext);
+			}
+
+			$finder = new \phpbb\finder($this->filesystem, $this->phpbb_root_path, null, $this->php_ext);
+			$migrator_classes = $finder->core_path('phpbb/db/migration/data/')->get_classes();
+			$factory = new \phpbb\db\tools\factory();
+			$db_tools = $factory->get($this->db, true);
+			$schema_generator = new \phpbb\db\migration\schema_generator(
+				$migrator_classes,
+				new \phpbb\config\config(array()),
+				$this->db,
+				$db_tools,
+				$this->phpbb_root_path,
+				$this->php_ext,
+				$table_prefix
+			);
+			$db_table_schema = $schema_generator->get_schema();
+			$db_table_schema = json_encode($db_table_schema, JSON_PRETTY_PRINT);
+
+			$this->config->set('change_table_prefix', false);
+		}
+
+		$fp = @fopen($this->phpbb_root_path . 'store/schema.json', 'wb');
+		if (!$fp)
+		{
+			throw new \Exception('INST_SCHEMA_FILE_NOT_WRITABLE');
+		}
+
+		fwrite($fp, $db_table_schema);
+		fclose($fp);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_CREATE_DATABASE_SCHEMA_FILE';
+	}
+}

phpbb/install/module/install_database/task/set_up_database.php

@@ -0,0 +1,164 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_database\task;
+
+/**
+ * Set up database for table generation
+ */
+class set_up_database extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\db\driver\driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $database_helper;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $schema_file_path;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config
+	 * @param \phpbb\install\helper\database						$db_helper
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler
+	 * @param string												$phpbb_root_path
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\database $db_helper,
+								\phpbb\filesystem\filesystem_interface $filesystem,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								$phpbb_root_path)
+	{
+		$dbms = $db_helper->get_available_dbms($config->get('dbms'));
+		$dbms = $dbms[$config->get('dbms')]['DRIVER'];
+
+		$this->db				= new $dbms();
+		$this->db->sql_connect(
+			$config->get('dbhost'),
+			$config->get('dbuser'),
+			$config->get('dbpasswd'),
+			$config->get('dbname'),
+			$config->get('dbport'),
+			false,
+			false
+		);
+
+		$this->config			= $config;
+		$this->database_helper	= $db_helper;
+		$this->filesystem		= $filesystem;
+		$this->iohandler		= $iohandler;
+		$this->phpbb_root_path	= $phpbb_root_path;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		$dbms = $this->config->get('dbms');
+		$dbms_info = $this->database_helper->get_available_dbms($dbms);
+		$schema_name = $dbms_info[$dbms]['SCHEMA'];
+
+		if ($dbms === 'mysql')
+		{
+			if (version_compare($this->db->sql_server_info(true), '4.1.3', '>='))
+			{
+				$schema_name .= '_41';
+			}
+			else
+			{
+				$schema_name .= '_40';
+			}
+		}
+
+		$this->schema_file_path = $this->phpbb_root_path . 'install/schemas/' . $schema_name . '_schema.sql';
+
+		return $this->filesystem->exists($this->schema_file_path);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->db->sql_return_on_error(true);
+
+		$dbms = $this->config->get('dbms');
+		$dbms_info = $this->database_helper->get_available_dbms($dbms);
+		$delimiter = $dbms_info[$dbms]['DELIM'];
+		$table_prefix = $this->config->get('table_prefix');
+
+		$sql_query = @file_get_contents($this->schema_file_path);
+		$sql_query = preg_replace('#phpbb_#i', $table_prefix, $sql_query);
+		$sql_query = $this->database_helper->remove_comments($sql_query);
+		$sql_query = $this->database_helper->split_sql_file($sql_query, $delimiter);
+
+		foreach ($sql_query as $sql)
+		{
+			if (!$this->db->sql_query($sql))
+			{
+				$error = $this->db->sql_error($this->db->get_sql_error_sql());
+				$this->iohandler->add_error_message('INST_ERR_DB', $error['message']);
+			}
+		}
+
+		unset($sql_query);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_SETUP_DATABASE';
+	}
+}

phpbb/install/module/install_filesystem/module.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_filesystem;
+
+/**
+ * Installer module for filesystem installation
+ */
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'install');
+	}
+}

phpbb/install/module/install_filesystem/task/create_config_file.php

@@ -0,0 +1,244 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_filesystem\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+/**
+ * Dumps config file
+ */
+class create_config_file extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $db_helper;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var array
+	 */
+	protected $options;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem
+	 * @param \phpbb\install\helper\config							$install_config
+	 * @param \phpbb\install\helper\database						$db_helper
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler
+	 * @param string												$phpbb_root_path
+	 * @param string												$php_ext
+	 * @param array													$options
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem,
+								\phpbb\install\helper\config $install_config,
+								\phpbb\install\helper\database $db_helper,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								$phpbb_root_path,
+								$php_ext,
+								$options = array())
+	{
+		$this->install_config	= $install_config;
+		$this->db_helper		= $db_helper;
+		$this->filesystem		= $filesystem;
+		$this->iohandler		= $iohandler;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+		$this->options			= array_merge(array(
+			'debug' => false,
+			'debug_container' => false,
+			'environment' => null,
+		), $options);
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$config_written = true;
+
+		// Create config.php
+		$path_to_config = $this->phpbb_root_path . 'config.' . $this->php_ext;
+
+		$fp = @fopen($path_to_config, 'w');
+		if (!$fp)
+		{
+			$config_written = false;
+		}
+
+		$config_content = $this->get_config_data($this->options['debug'], $this->options['debug_container'], $this->options['environment']);
+
+		if (!@fwrite($fp, $config_content))
+		{
+			$config_written = false;
+		}
+
+		@fclose($fp);
+
+		// chmod config.php to be only readable
+		if ($config_written)
+		{
+			try
+			{
+				$this->filesystem->phpbb_chmod($path_to_config, \phpbb\filesystem\filesystem_interface::CHMOD_READ);
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing, the user will get a notice later
+			}
+		}
+		else
+		{
+			$this->iohandler->add_error_message('UNABLE_TO_WRITE_CONFIG_FILE');
+			throw new user_interaction_required_exception();
+		}
+
+		// Create a lock file to indicate that there is an install in progress
+		$fp = @fopen($this->phpbb_root_path . 'cache/install_lock', 'wb');
+		if ($fp === false)
+		{
+			// We were unable to create the lock file - abort
+			$this->iohandler->add_error_message('UNABLE_TO_WRITE_LOCK');
+			throw new user_interaction_required_exception();
+		}
+		@fclose($fp);
+
+		try
+		{
+			$this->filesystem->phpbb_chmod($this->phpbb_root_path . 'cache/install_lock', 0777);
+		}
+		catch (\phpbb\filesystem\exception\filesystem_exception $e)
+		{
+			// Do nothing, the user will get a notice later
+		}
+	}
+
+	/**
+	 * Returns the content which should be dumped to config.php
+	 *
+	 * @param bool		$debug 				If the debug constants should be enabled by default or not
+	 * @param bool		$debug_container 	If the container should be compiled on
+	 *										every page load or not
+	 * @param string	$environment		The environment to use
+	 *
+	 * @return string	content to be written to the config file
+	 */
+	protected function get_config_data($debug = false, $debug_container = false, $environment = null)
+	{
+		$config_content = "<?php\n";
+		$config_content .= "// phpBB 3.2.x auto-generated configuration file\n// Do not change anything in this file!\n";
+
+		$dbms = $this->install_config->get('dbms');
+		$db_driver = $this->db_helper->get_available_dbms($dbms);
+		$db_driver = $db_driver[$dbms]['DRIVER'];
+
+		$config_data_array = array(
+			'dbms'			=> $db_driver,
+			'dbhost'		=> $this->install_config->get('dbhost'),
+			'dbport'		=> $this->install_config->get('dbport'),
+			'dbname'		=> $this->install_config->get('dbname'),
+			'dbuser'		=> $this->install_config->get('dbuser'),
+			'dbpasswd'		=> $this->install_config->get('dbpasswd'),
+			'table_prefix'	=> $this->install_config->get('table_prefix'),
+
+			'phpbb_adm_relative_path'	=> 'adm/',
+
+			'acm_type'		=> 'phpbb\cache\driver\file',
+		);
+
+		foreach ($config_data_array as $key => $value)
+		{
+			$config_content .= "\${$key} = '" . str_replace("'", "\\'", str_replace('\\', '\\\\', $value)) . "';\n";
+		}
+
+		$config_content .= "\n@define('PHPBB_INSTALLED', true);\n";
+		$config_content .= "// @define('PHPBB_DISPLAY_LOAD_TIME', true);\n";
+
+		if ($environment)
+		{
+			$config_content .= "@define('PHPBB_ENVIRONMENT', 'test');\n";
+		}
+		else if ($debug)
+		{
+			$config_content .= "@define('PHPBB_ENVIRONMENT', 'development');\n";
+		}
+		else
+		{
+			$config_content .= "@define('PHPBB_ENVIRONMENT', 'production');\n";
+		}
+
+		if ($debug_container)
+		{
+			$config_content .= "@define('DEBUG_CONTAINER', true);\n";
+		}
+		else
+		{
+			$config_content .= "// @define('DEBUG_CONTAINER', true);\n";
+		}
+
+		if ($environment === 'test')
+		{
+			$config_content .= "@define('DEBUG_TEST', true);\n";
+
+			// Mandatory for the functional tests, will be removed by PHPBB3-12623
+			$config_content .= "@define('DEBUG', true);\n";
+		}
+
+		return $config_content;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_CREATE_CONFIG_FILE';
+	}
+}

phpbb/install/module/install_finish/module.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_finish;
+
+/**
+ * Installer module for filesystem installation
+ */
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'install');
+	}
+}

phpbb/install/module/install_finish/task/install_extensions.php

@@ -0,0 +1,207 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_finish\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+
+/**
+ * Installs extensions that exist in ext folder upon install
+ */
+class install_extensions extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\config\db
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\log\log_interface
+	 */
+	protected $log;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/** @var \phpbb\extension\manager */
+	protected $extension_manager;
+
+	/** @var \Symfony\Component\Finder\Finder */
+	protected $finder;
+
+	/** @var string Extension table */
+	protected $extension_table;
+
+	/** @var \phpbb\db\driver\driver_interface */
+	protected $db;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\container_factory				$container
+	 * @param \phpbb\install\helper\config							$install_config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler
+	 * @param string												$phpbb_root_path phpBB root path
+	 */
+	public function __construct(\phpbb\install\helper\container_factory $container, \phpbb\install\helper\config $install_config, \phpbb\install\helper\iohandler\iohandler_interface $iohandler, $phpbb_root_path)
+	{
+		$this->install_config	= $install_config;
+		$this->iohandler		= $iohandler;
+		$this->extension_table = $container->get_parameter('tables.ext');
+
+		$this->log				= $container->get('log');
+		$this->user				= $container->get('user');
+		$this->extension_manager = $container->get('ext.manager');
+		$this->config			= $container->get('config');
+		$this->db				= $container->get('dbal.conn');
+		$this->finder = new \Symfony\Component\Finder\Finder();
+		$this->finder->in($phpbb_root_path . 'ext/')
+			->ignoreUnreadableDirs()
+			->depth('< 3')
+			->files()
+			->name('composer.json');
+
+		// Make sure asset version exists in config. Otherwise we might try to
+		// insert the assets_version setting into the database and cause a
+		// duplicate entry error.
+		if (!isset($this->config['assets_version']))
+		{
+			$this->config['assets_version'] = 0;
+		}
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->user->session_begin();
+		$this->user->setup(array('common', 'acp/common', 'cli'));
+
+		$install_extensions = $this->iohandler->get_input('install-extensions', array());
+
+		$all_available_extensions = $this->extension_manager->all_available();
+		$i = $this->install_config->get('install_extensions_index', 0);
+		$available_extensions = array_slice($all_available_extensions, $i);
+
+		// Install extensions
+		foreach ($available_extensions as $ext_name => $ext_path)
+		{
+			if (!empty($install_extensions) && $install_extensions !== ['all'] && !in_array($ext_name, $install_extensions))
+			{
+				continue;
+			}
+
+			try
+			{
+				$extension = $this->extension_manager->get_extension($ext_name);
+
+				if (!$extension->is_enableable())
+				{
+					$this->iohandler->add_log_message(array('CLI_EXTENSION_NOT_ENABLEABLE', $ext_name));
+					continue;
+				}
+
+				$this->extension_manager->enable($ext_name);
+				$extensions = $this->get_extensions();
+
+				if (isset($extensions[$ext_name]) && $extensions[$ext_name]['ext_active'])
+				{
+					// Create log
+					$this->log->add('admin', ANONYMOUS, '', 'LOG_EXT_ENABLE', time(), array($ext_name));
+					$this->iohandler->add_success_message(array('CLI_EXTENSION_ENABLE_SUCCESS', $ext_name));
+				}
+				else
+				{
+					$this->iohandler->add_log_message(array('CLI_EXTENSION_ENABLE_FAILURE', $ext_name));
+				}
+			}
+			catch (\Exception $e)
+			{
+				// Add fail log and continue
+				$this->iohandler->add_log_message(array('CLI_EXTENSION_ENABLE_FAILURE', $ext_name));
+			}
+
+			$i++;
+
+			// Stop execution if resource limit is reached
+			if ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0)
+			{
+				break;
+			}
+		}
+
+		$this->install_config->set('install_extensions_index', $i);
+
+		if ($i < count($all_available_extensions))
+		{
+			throw new resource_limit_reached_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_INSTALL_EXTENSIONS';
+	}
+
+	/**
+	 * Get extensions from database
+	 *
+	 * @return array List of extensions
+	 */
+	private function get_extensions()
+	{
+		$sql = 'SELECT *
+			FROM ' . $this->extension_table;
+
+		$result = $this->db->sql_query($sql);
+		$extensions_row = $this->db->sql_fetchrowset($result);
+		$this->db->sql_freeresult($result);
+
+		$extensions = array();
+
+		foreach ($extensions_row as $extension)
+		{
+			$extensions[$extension['ext_name']] = $extension;
+		}
+
+		ksort($extensions);
+
+		return $extensions;
+	}
+}

phpbb/install/module/install_finish/task/notify_user.php

@@ -0,0 +1,174 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_finish\task;
+
+use phpbb\config\db;
+
+/**
+ * Logs installation and sends an email to the admin
+ */
+class notify_user extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\auth\auth
+	 */
+	protected $auth;
+
+	/**
+	 * @var \phpbb\config\db
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var \phpbb\log\log_interface
+	 */
+	protected $log;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\container_factory				$container
+	 * @param \phpbb\install\helper\config							$install_config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler
+	 * @param string												$phpbb_root_path
+	 * @param string												$php_ext
+	 */
+	public function __construct(\phpbb\install\helper\container_factory $container, \phpbb\install\helper\config $install_config, \phpbb\install\helper\iohandler\iohandler_interface $iohandler, $phpbb_root_path, $php_ext)
+	{
+		$this->install_config	= $install_config;
+		$this->iohandler		= $iohandler;
+
+		$this->auth				= $container->get('auth');
+		$this->language			= $container->get('language');
+		$this->log				= $container->get('log');
+		$this->user				= $container->get('user');
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		// We need to reload config for cases when it doesn't have all values
+		/** @var \phpbb\cache\driver\driver_interface $cache */
+		$cache = $container->get('cache.driver');
+		$cache->destroy('config');
+
+		$this->config = new db(
+			$container->get('dbal.conn'),
+			$cache,
+			$container->get_parameter('tables.config')
+		);
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->user->session_begin();
+		$this->user->setup('common');
+
+		if ($this->config['email_enable'])
+		{
+			include ($this->phpbb_root_path . 'includes/functions_messenger.' . $this->php_ext);
+
+			// functions_messenger.php uses config to determine language paths
+			// Remove when able
+			global $config;
+			$config = $this->config;
+
+			$messenger = new \messenger(false);
+			$messenger->template('installed', $this->install_config->get('user_language', 'en'));
+			$messenger->to($this->config['board_email'], $this->install_config->get('admin_name'));
+			$messenger->anti_abuse_headers($this->config, $this->user);
+			$messenger->assign_vars(array(
+					'USERNAME'		=> htmlspecialchars_decode($this->install_config->get('admin_name')),
+					'PASSWORD'		=> htmlspecialchars_decode($this->install_config->get('admin_passwd')))
+			);
+			$messenger->send(NOTIFY_EMAIL);
+		}
+
+		// Login admin
+		// Ugly but works
+		$this->auth->login(
+			$this->install_config->get('admin_name'),
+			$this->install_config->get('admin_passwd'),
+			false,
+			true,
+			true
+		);
+
+		$this->iohandler->set_cookie($this->config['cookie_name'] . '_sid', $this->user->session_id);
+		$this->iohandler->set_cookie($this->config['cookie_name'] . '_u', $this->user->cookie_data['u']);
+		$this->iohandler->set_cookie($this->config['cookie_name'] . '_k', $this->user->cookie_data['k']);
+
+		// Create log
+		$this->log->add(
+			'admin',
+			$this->user->data['user_id'],
+			$this->user->ip,
+			'LOG_INSTALL_INSTALLED',
+			false,
+			array($this->config['version'])
+		);
+
+		// Remove install_lock
+		@unlink($this->phpbb_root_path . 'cache/install_lock');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_NOTIFY_USER';
+	}
+}

phpbb/install/module/install_finish/task/populate_migrations.php

@@ -0,0 +1,93 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\install_finish\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+
+/**
+ * Populates migrations
+ */
+class populate_migrations extends \phpbb\install\task_base
+{
+	/**
+	 * @var config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\extension\manager
+	 */
+	protected $extension_manager;
+
+	/**
+	 * @var \phpbb\db\migrator
+	 */
+	protected $migrator;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config			$config		Installer's config
+	 * @param container_factory	$container	phpBB's DI contianer
+	 */
+	public function __construct(config $config, container_factory $container)
+	{
+		$this->config				= $config;
+		$this->extension_manager	= $container->get('ext.manager');
+		$this->migrator				= $container->get('migrator');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if (!$this->config->get('populate_migration_refresh_before', false))
+		{
+			if ($this->config->get_time_remaining() < 1)
+			{
+				$this->config->set('populate_migration_refresh_before', true);
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		$finder = $this->extension_manager->get_finder();
+
+		$migrations = $finder
+			->core_path('phpbb/db/migration/data/')
+			->set_extensions(array())
+			->get_classes();
+		$this->migrator->populate_migrations($migrations);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_POPULATE_MIGRATIONS';
+	}
+}

phpbb/install/module/obtain_data/install_module.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data;
+
+class install_module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'obtain_data');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		return 0;
+	}
+}

phpbb/install/module/obtain_data/task/obtain_admin_data.php

@@ -0,0 +1,218 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+/**
+ * This class requests and validates admin account data from the user
+ */
+class obtain_admin_data extends \phpbb\install\task_base implements \phpbb\install\task_interface
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$install_config	Installer's config helper
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler		Installer's input-output handler
+	 */
+	public function __construct(\phpbb\install\helper\config $install_config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler)
+	{
+		$this->install_config	= $install_config;
+		$this->io_handler		= $iohandler;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Check if data is sent
+		if ($this->io_handler->get_input('submit_admin', false))
+		{
+			$this->process_form();
+		}
+		else
+		{
+			$this->request_form_data();
+		}
+	}
+
+	/**
+	 * Process form data
+	 */
+	protected function process_form()
+	{
+		// Admin data
+		$admin_name		= $this->io_handler->get_input('admin_name', '', true);
+		$admin_pass1	= $this->io_handler->get_input('admin_pass1', '', true);
+		$admin_pass2	= $this->io_handler->get_input('admin_pass2', '', true);
+		$board_email	= $this->io_handler->get_input('board_email', '', true);
+
+		$admin_data_valid = $this->check_admin_data($admin_name, $admin_pass1, $admin_pass2, $board_email);
+
+		if ($admin_data_valid)
+		{
+			$this->install_config->set('admin_name', $admin_name);
+			$this->install_config->set('admin_passwd', $admin_pass1);
+			$this->install_config->set('board_email', $board_email);
+		}
+		else
+		{
+			$this->request_form_data(true);
+		}
+	}
+
+	/**
+	 * Request data from the user
+	 *
+	 * @param bool $use_request_data Whether to use submited data
+	 *
+	 * @throws \phpbb\install\exception\user_interaction_required_exception When the user is required to provide data
+	 */
+	protected function request_form_data($use_request_data = false)
+	{
+		if ($use_request_data)
+		{
+			$admin_username	= $this->io_handler->get_input('admin_name', '', true);
+			$admin_email	= $this->io_handler->get_input('board_email', '', true);
+		}
+		else
+		{
+			$admin_username	= '';
+			$admin_email	= '';
+		}
+
+		$admin_form = array(
+			'admin_name'	=> array(
+				'label'			=> 'ADMIN_USERNAME',
+				'description'	=> 'ADMIN_USERNAME_EXPLAIN',
+				'type'			=> 'text',
+				'default'		=> $admin_username,
+			),
+			'board_email'	=> array(
+				'label'		=> 'CONTACT_EMAIL',
+				'type'		=> 'email',
+				'default'	=> $admin_email,
+			),
+			'admin_pass1'	=> array(
+				'label'			=> 'ADMIN_PASSWORD',
+				'description'	=> 'ADMIN_PASSWORD_EXPLAIN',
+				'type'			=> 'password',
+			),
+			'admin_pass2'	=> array(
+				'label'	=> 'ADMIN_PASSWORD_CONFIRM',
+				'type'	=> 'password',
+			),
+			'submit_admin'	=> array(
+				'label'	=> 'SUBMIT',
+				'type'	=> 'submit',
+			),
+		);
+
+		$this->io_handler->add_user_form_group('ADMIN_CONFIG', $admin_form);
+
+		// Require user interaction
+		throw new user_interaction_required_exception();
+	}
+
+	/**
+	 * Check admin data
+	 *
+	 * @param string	$username	Admin username
+	 * @param string	$pass1		Admin password
+	 * @param string	$pass2		Admin password confirmation
+	 * @param string	$email		Admin e-mail address
+	 *
+	 * @return bool	True if data is valid, false otherwise
+	 */
+	protected function check_admin_data($username, $pass1, $pass2, $email)
+	{
+		$data_valid = true;
+
+		// Check if none of admin data is empty
+		if (in_array('', array($username, $pass1, $pass2, $email), true))
+		{
+			$this->io_handler->add_error_message('INST_ERR_MISSING_DATA');
+			$data_valid = false;
+		}
+
+		if (utf8_strlen($username) < 3)
+		{
+			$this->io_handler->add_error_message('INST_ERR_USER_TOO_SHORT');
+			$data_valid = false;
+		}
+
+		if (utf8_strlen($username) > 20)
+		{
+			$this->io_handler->add_error_message('INST_ERR_USER_TOO_LONG');
+			$data_valid = false;
+		}
+
+		if ($pass1 !== $pass2 && $pass1 !== '')
+		{
+			$this->io_handler->add_error_message('INST_ERR_PASSWORD_MISMATCH');
+			$data_valid = false;
+		}
+
+		// Test against the default password rules
+		if (utf8_strlen($pass1) < 6)
+		{
+			$this->io_handler->add_error_message('INST_ERR_PASSWORD_TOO_SHORT');
+			$data_valid = false;
+		}
+
+		if (utf8_strlen($pass1) > 30)
+		{
+			$this->io_handler->add_error_message('INST_ERR_PASSWORD_TOO_LONG');
+			$data_valid = false;
+		}
+
+		if (!preg_match('/^' . get_preg_expression('email') . '$/i', $email))
+		{
+			$this->io_handler->add_error_message('INST_ERR_EMAIL_INVALID');
+			$data_valid = false;
+		}
+
+		return $data_valid;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/obtain_data/task/obtain_board_data.php

@@ -0,0 +1,185 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+/**
+ * This class obtains default data from the user related to board (Board name, Board descritpion, etc...)
+ */
+class obtain_board_data extends \phpbb\install\task_base implements \phpbb\install\task_interface
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * @var \phpbb\language\language_file_helper
+	 */
+	protected $language_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config			Installer's config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler		Installer's input-output handler
+	 * @param \phpbb\language\language_file_helper					$lang_helper	Language file helper
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler,
+								\phpbb\language\language_file_helper $lang_helper)
+	{
+		$this->install_config	= $config;
+		$this->io_handler		= $iohandler;
+		$this->language_helper	= $lang_helper;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Check if data is sent
+		if ($this->io_handler->get_input('submit_board', false))
+		{
+			$this->process_form();
+		}
+		else
+		{
+			$this->request_form_data();
+		}
+	}
+
+	/**
+	 * Process form data
+	 */
+	protected function process_form()
+	{
+		// Board data
+		$default_lang	= $this->io_handler->get_input('default_lang', '');
+		$board_name		= $this->io_handler->get_input('board_name', '', true);
+		$board_desc		= $this->io_handler->get_input('board_description', '', true);
+
+		// Check default lang
+		$langs = $this->language_helper->get_available_languages();
+		$lang_valid = false;
+
+		foreach ($langs as $lang)
+		{
+			if ($lang['iso'] === $default_lang)
+			{
+				$lang_valid = true;
+				break;
+			}
+		}
+
+		$this->install_config->set('board_name', $board_name);
+		$this->install_config->set('board_description', $board_desc);
+
+		if ($lang_valid)
+		{
+			$this->install_config->set('default_lang', $default_lang);
+		}
+		else
+		{
+			$this->request_form_data(true);
+		}
+	}
+
+	/**
+	 * Request data from the user
+	 *
+	 * @param bool $use_request_data Whether to use submited data
+	 *
+	 * @throws \phpbb\install\exception\user_interaction_required_exception When the user is required to provide data
+	 */
+	protected function request_form_data($use_request_data = false)
+	{
+		if ($use_request_data)
+		{
+			$board_name		= $this->io_handler->get_input('board_name', '', true);
+			$board_desc		= $this->io_handler->get_input('board_description', '', true);
+		}
+		else
+		{
+			$board_name		= '{L_CONFIG_SITENAME}';
+			$board_desc		= '{L_CONFIG_SITE_DESC}';
+		}
+
+		// Use language because we only check this to be valid
+		$default_lang	= $this->install_config->get('user_language', 'en');
+
+		$langs = $this->language_helper->get_available_languages();
+		$lang_options = array();
+
+		foreach ($langs as $lang)
+		{
+			$lang_options[] = array(
+				'value'		=> $lang['iso'],
+				'label'		=> $lang['local_name'],
+				'selected'	=> ($default_lang === $lang['iso']),
+			);
+		}
+
+		$board_form = array(
+			'default_lang' => array(
+				'label'		=> 'DEFAULT_LANGUAGE',
+				'type'		=> 'select',
+				'options'	=> $lang_options,
+			),
+			'board_name' => array(
+				'label'		=> 'BOARD_NAME',
+				'type'		=> 'text',
+				'default'	=> $board_name,
+			),
+			'board_description' => array(
+				'label'		=> 'BOARD_DESCRIPTION',
+				'type'		=> 'text',
+				'default'	=> $board_desc,
+			),
+			'submit_board'	=> array(
+				'label'	=> 'SUBMIT',
+				'type'	=> 'submit',
+			),
+		);
+
+		$this->io_handler->add_user_form_group('BOARD_CONFIG', $board_form);
+
+		throw new user_interaction_required_exception();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/obtain_data/task/obtain_database_data.php

@@ -0,0 +1,270 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+/**
+ * This class requests and validates database information from the user
+ */
+class obtain_database_data extends \phpbb\install\task_base implements \phpbb\install\task_interface
+{
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $database_helper;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\database						$database_helper	Installer's database helper
+	 * @param \phpbb\install\helper\config							$install_config		Installer's config helper
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler			Installer's input-output handler
+	 */
+	public function __construct(\phpbb\install\helper\database $database_helper,
+								\phpbb\install\helper\config $install_config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler)
+	{
+		$this->database_helper	= $database_helper;
+		$this->install_config	= $install_config;
+		$this->io_handler		= $iohandler;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Check if data is sent
+		if ($this->io_handler->get_input('submit_database', false))
+		{
+			$this->process_form();
+		}
+		else
+		{
+			$this->request_form_data();
+		}
+	}
+
+	/**
+	 * Process form data
+	 */
+	protected function process_form()
+	{
+		// Collect database data
+		$dbms			= $this->io_handler->get_input('dbms', '');
+		$dbhost			= $this->io_handler->get_input('dbhost', '', true);
+		$dbport			= $this->io_handler->get_input('dbport', '');
+		$dbuser			= $this->io_handler->get_input('dbuser', '', true);
+		$dbpasswd		= $this->io_handler->get_raw_input('dbpasswd', '', true);
+		$dbname			= $this->io_handler->get_input('dbname', '', true);
+		$table_prefix	= $this->io_handler->get_input('table_prefix', '', true);
+
+		// Check database data
+		$user_data_vaild = $this->check_database_data($dbms, $dbhost, $dbport, $dbuser, $dbpasswd, $dbname, $table_prefix);
+
+		// Save database data if it is correct
+		if ($user_data_vaild)
+		{
+			$this->install_config->set('dbms', $dbms);
+			$this->install_config->set('dbhost', $dbhost);
+			$this->install_config->set('dbport', $dbport);
+			$this->install_config->set('dbuser', $dbuser);
+			$this->install_config->set('dbpasswd', $dbpasswd);
+			$this->install_config->set('dbname', $dbname);
+			$this->install_config->set('table_prefix', $table_prefix);
+		}
+		else
+		{
+			$this->request_form_data(true);
+		}
+	}
+
+	/**
+	 * Request data from the user
+	 *
+	 * @param bool $use_request_data Whether to use submited data
+	 *
+	 * @throws \phpbb\install\exception\user_interaction_required_exception When the user is required to provide data
+	 */
+	protected function request_form_data($use_request_data = false)
+	{
+		if ($use_request_data)
+		{
+			$dbms			= $this->io_handler->get_input('dbms', '');
+			$dbhost			= $this->io_handler->get_input('dbhost', '', true);
+			$dbport			= $this->io_handler->get_input('dbport', '');
+			$dbuser			= $this->io_handler->get_input('dbuser', '');
+			$dbname			= $this->io_handler->get_input('dbname', '');
+			$table_prefix	= $this->io_handler->get_input('table_prefix', 'phpbb_');
+		}
+		else
+		{
+			$dbms			= '';
+			$dbhost			= '';
+			$dbport			= '';
+			$dbuser			= '';
+			$dbname			= '';
+			$table_prefix	= 'phpbb_';
+		}
+
+		$dbms_select = array();
+		foreach ($this->database_helper->get_available_dbms() as $dbms_key => $dbms_array)
+		{
+			$dbms_select[] = array(
+				'value'		=> $dbms_key,
+				'label'		=> 'DB_OPTION_' . strtoupper($dbms_key),
+				'selected'	=> ($dbms_key === $dbms),
+			);
+		}
+
+		$database_form = array(
+			'dbms' => array(
+				'label'		=> 'DBMS',
+				'type'		=> 'select',
+				'options'	=> $dbms_select,
+			),
+			'dbhost' => array(
+				'label'			=> 'DB_HOST',
+				'description'	=> 'DB_HOST_EXPLAIN',
+				'type'			=> 'text',
+				'default'		=> $dbhost,
+			),
+			'dbport' => array(
+				'label'			=> 'DB_PORT',
+				'description'	=> 'DB_PORT_EXPLAIN',
+				'type'			=> 'text',
+				'default'		=> $dbport,
+			),
+			'dbuser' => array(
+				'label'		=> 'DB_USERNAME',
+				'type'		=> 'text',
+				'default'	=> $dbuser,
+			),
+			'dbpasswd' => array(
+				'label'		=> 'DB_PASSWORD',
+				'type'	=> 'password',
+			),
+			'dbname' => array(
+				'label'		=> 'DB_NAME',
+				'type'		=> 'text',
+				'default'	=> $dbname,
+			),
+			'table_prefix' => array(
+				'label'			=> 'TABLE_PREFIX',
+				'description'	=> 'TABLE_PREFIX_EXPLAIN',
+				'type'			=> 'text',
+				'default'		=> $table_prefix,
+			),
+			'submit_database' => array(
+				'label'	=> 'SUBMIT',
+				'type'	=> 'submit',
+			),
+		);
+
+		$this->io_handler->add_user_form_group('DB_CONFIG', $database_form);
+
+		// Require user interaction
+		throw new user_interaction_required_exception();
+	}
+
+	/**
+	 * Check database data
+	 *
+	 * @param string	$dbms			Selected database type
+	 * @param string	$dbhost			Database host address
+	 * @param int		$dbport			Database port number
+	 * @param string	$dbuser			Database username
+	 * @param string	$dbpass			Database password
+	 * @param string	$dbname			Database name
+	 * @param string	$table_prefix	Database table prefix
+	 *
+	 * @return bool	True if database data is correct, false otherwise
+	 */
+	protected function check_database_data($dbms, $dbhost, $dbport, $dbuser, $dbpass, $dbname, $table_prefix)
+	{
+		$available_dbms = $this->database_helper->get_available_dbms();
+		$data_valid = true;
+
+		// Check if PHP has the database extensions for the specified DBMS
+		if (!isset($available_dbms[$dbms]))
+		{
+			$this->io_handler->add_error_message('INST_ERR_NO_DB');
+			$data_valid = false;
+		}
+
+		// Validate table prefix
+		$prefix_valid = $this->database_helper->validate_table_prefix($dbms, $table_prefix);
+		if (is_array($prefix_valid))
+		{
+			foreach ($prefix_valid as $error)
+			{
+				$this->io_handler->add_error_message(
+					$error['title'],
+					(isset($error['description'])) ? $error['description'] : false
+				);
+			}
+
+			$data_valid = false;
+		}
+
+		// Try to connect to database if all provided data is valid
+		if ($data_valid)
+		{
+			$connect_test = $this->database_helper->check_database_connection($dbms, $dbhost, $dbport, $dbuser, $dbpass, $dbname, $table_prefix);
+			if (is_array($connect_test))
+			{
+				foreach ($connect_test as $error)
+				{
+					$this->io_handler->add_error_message(
+						$error['title'],
+						(isset($error['description'])) ? $error['description'] : false
+					);
+				}
+
+				$data_valid = false;
+			}
+		}
+
+		return $data_valid;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/obtain_data/task/obtain_email_data.php

@@ -0,0 +1,173 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+class obtain_email_data extends \phpbb\install\task_base implements \phpbb\install\task_interface
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config		Installer's config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler	Installer's input-output handler
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler)
+	{
+		$this->install_config	= $config;
+		$this->io_handler		= $iohandler;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// E-mail data
+		$email_enable	= $this->io_handler->get_input('email_enable', true);
+		$smtp_delivery	= $this->io_handler->get_input('smtp_delivery', '');
+		$smtp_host		= $this->io_handler->get_input('smtp_host', '', true);
+		$smtp_port		= $this->io_handler->get_input('smtp_port', '');
+		$smtp_auth		= $this->io_handler->get_input('smtp_auth', '');
+		$smtp_user		= $this->io_handler->get_input('smtp_user', '', true);
+		$smtp_passwd	= $this->io_handler->get_input('smtp_pass', '', true);
+
+		$auth_methods = array('PLAIN', 'LOGIN', 'CRAM-MD5', 'DIGEST-MD5', 'POP-BEFORE-SMTP');
+
+		// Check if data is sent
+		if ($this->io_handler->get_input('submit_email', false))
+		{
+			$this->install_config->set('email_enable', $email_enable);
+			$this->install_config->set('smtp_delivery', $smtp_delivery);
+			$this->install_config->set('smtp_host', $smtp_host);
+			$this->install_config->set('smtp_port', $smtp_port);
+			$this->install_config->set('smtp_auth', $smtp_auth);
+			$this->install_config->set('smtp_user', $smtp_user);
+			$this->install_config->set('smtp_pass', $smtp_passwd);
+		}
+		else
+		{
+			$auth_options = array();
+			foreach ($auth_methods as $method)
+			{
+				$auth_options[] = array(
+					'value'		=> $method,
+					'label'		=> 'SMTP_' . str_replace('-', '_', $method),
+					'selected'	=> false,
+				);
+			}
+
+			$email_form = array(
+				'email_enable' => array(
+					'label'			=> 'ENABLE_EMAIL',
+					'description'	=> 'ENABLE_EMAIL_EXPLAIN',
+					'type'			=> 'radio',
+					'options'		=> array(
+						array(
+							'value'		=> 1,
+							'label'		=> 'ENABLE',
+							'selected'	=> true,
+						),
+						array(
+							'value'		=> 0,
+							'label'		=> 'DISABLE',
+							'selected'	=> false,
+						),
+					),
+				),
+				'smtp_delivery' => array(
+					'label'			=> 'USE_SMTP',
+					'description'	=> 'USE_SMTP_EXPLAIN',
+					'type'			=> 'radio',
+					'options'		=> array(
+						array(
+							'value'		=> 0,
+							'label'		=> 'NO',
+							'selected'	=> true,
+						),
+						array(
+							'value'		=> 1,
+							'label'		=> 'YES',
+							'selected'	=> false,
+						),
+					),
+				),
+				'smtp_host' => array(
+					'label'			=> 'SMTP_SERVER',
+					'type'			=> 'text',
+					'default'		=> $smtp_host,
+				),
+				'smtp_port' => array(
+					'label'			=> 'SMTP_PORT',
+					'type'			=> 'text',
+					'default'		=> $smtp_port,
+				),
+				'smtp_auth' => array(
+					'label'			=> 'SMTP_AUTH_METHOD',
+					'description'	=> 'SMTP_AUTH_METHOD_EXPLAIN',
+					'type'			=> 'select',
+					'options'		=> $auth_options,
+				),
+				'smtp_user' => array(
+					'label'			=> 'SMTP_USERNAME',
+					'description'	=> 'SMTP_USERNAME_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> $smtp_user,
+				),
+				'smtp_pass' => array(
+					'label'			=> 'SMTP_PASSWORD',
+					'description'	=> 'SMTP_PASSWORD_EXPLAIN',
+					'type'			=> 'password',
+				),
+				'submit_email' => array(
+					'label'	=> 'SUBMIT',
+					'type'	=> 'submit',
+				),
+			);
+
+			$this->io_handler->add_user_form_group('EMAIL_CONFIG', $email_form);
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/obtain_data/task/obtain_file_updater_method.php

@@ -0,0 +1,167 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\task_base;
+
+class obtain_file_updater_method extends task_base
+{
+	/**
+	 * @var array	Supported compression methods
+	 *
+	 * Note: .tar is assumed to be supported, but not in the list
+	 */
+	protected $available_methods;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$installer_config
+	 * @param iohandler_interface	$iohandler
+	 */
+	public function __construct(config $installer_config, iohandler_interface $iohandler)
+	{
+		$this->installer_config	= $installer_config;
+		$this->iohandler		= $iohandler;
+
+		$this->available_methods = array('.tar.gz' => 'zlib', '.tar.bz2' => 'bz2', '.zip' => 'zlib');
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Check if data is sent
+		if ($this->iohandler->get_input('submit_update_file', false))
+		{
+			$supported_methods = array('compression', 'ftp', 'direct_file');
+			$method = $this->iohandler->get_input('method', 'compression');
+			$update_method = (in_array($method, $supported_methods, true)) ? $method : 'compression';
+			$this->installer_config->set('file_update_method', $update_method);
+
+			$compression = $this->iohandler->get_input('compression_method', '.zip');
+			$supported_methods = array_keys($this->available_methods);
+			$supported_methods[] = '.tar';
+			$compression = (in_array($compression, $supported_methods, true)) ? $compression : '.zip';
+			$this->installer_config->set('file_update_compression', $compression);
+		}
+		else
+		{
+			$this->iohandler->add_user_form_group('UPDATE_FILE_METHOD_TITLE', array(
+				'method' => array(
+					'label'		=> 'UPDATE_FILE_METHOD',
+					'type'		=> 'select',
+					'options'	=> array(
+						array(
+							'value'		=> 'compression',
+							'label'		=> 'UPDATE_FILE_METHOD_DOWNLOAD',
+							'selected'	=> true,
+						),
+						array(
+							'value'		=> 'ftp',
+							'label'		=> 'UPDATE_FILE_METHOD_FTP',
+							'selected'	=> false,
+						),
+						array(
+							'value'		=> 'direct_file',
+							'label'		=> 'UPDATE_FILE_METHOD_FILESYSTEM',
+							'selected'	=> false,
+						),
+					),
+				),
+				'compression_method' => array(
+					'label'		=> 'SELECT_DOWNLOAD_FORMAT',
+					'type'		=> 'select',
+					'options'	=> $this->get_available_compression_methods(),
+				),
+				'submit_update_file' => array(
+					'label'	=> 'SUBMIT',
+					'type'	=> 'submit',
+				),
+			));
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * Returns form elements in an array of available compression methods
+	 *
+	 * @return array
+	 */
+	protected function get_available_compression_methods()
+	{
+		$methods[] = array(
+			'value'		=> '.tar',
+			'label'		=> '.tar',
+			'selected'	=> true,
+		);
+
+		foreach ($this->available_methods as $type => $module)
+		{
+			if (!@extension_loaded($module))
+			{
+				continue;
+			}
+
+			$methods[] = array(
+				'value'		=> $type,
+				'label'		=> $type,
+				'selected'	=> false,
+			);
+		}
+
+		return $methods;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/obtain_data/task/obtain_server_data.php

@@ -0,0 +1,202 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+
+/**
+ * This class requests and saves some information about the server
+ */
+class obtain_server_data extends \phpbb\install\task_base implements \phpbb\install\task_interface
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $io_handler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\config							$config		Installer's config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler	Installer's input-output handler
+	 */
+	public function __construct(\phpbb\install\helper\config $config,
+								\phpbb\install\helper\iohandler\iohandler_interface $iohandler)
+	{
+		$this->install_config	= $config;
+		$this->io_handler		= $iohandler;
+
+		parent::__construct(true);
+	}
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$cookie_secure = $this->io_handler->is_secure();
+		$server_protocol = ($this->io_handler->is_secure()) ? 'https://' : 'http://';
+		$server_port = $this->io_handler->get_server_variable('SERVER_PORT', 0);
+
+		// HTTP_HOST is having the correct browser url in most cases...
+		$server_name = strtolower(htmlspecialchars_decode($this->io_handler->get_header_variable(
+			'Host',
+			$this->io_handler->get_server_variable('SERVER_NAME')
+		)));
+
+		// HTTP HOST can carry a port number...
+		if (strpos($server_name, ':') !== false)
+		{
+			$server_name = substr($server_name, 0, strpos($server_name, ':'));
+		}
+
+		$script_path = htmlspecialchars_decode($this->io_handler->get_server_variable('PHP_SELF'));
+
+		if (!$script_path)
+		{
+			$script_path = htmlspecialchars_decode($this->io_handler->get_server_variable('REQUEST_URI'));
+		}
+
+		$script_path = str_replace(array('\\', '//'), '/', $script_path);
+		$script_path = trim(dirname(dirname(dirname($script_path)))); // Because we are in install/app.php/route_name
+
+		// Server data
+		$cookie_secure		= $this->io_handler->get_input('cookie_secure', $cookie_secure);
+		$server_protocol	= $this->io_handler->get_input('server_protocol', $server_protocol);
+		$force_server_vars	= $this->io_handler->get_input('force_server_vars', 0);
+		$server_name		= $this->io_handler->get_input('server_name', $server_name, true);
+		$server_port		= $this->io_handler->get_input('server_port', $server_port);
+		$script_path		= $this->io_handler->get_input('script_path', $script_path, true);
+
+		// Clean up script path
+		if ($script_path !== '/')
+		{
+			// Adjust destination path (no trailing slash)
+			if (substr($script_path, -1) === '/')
+			{
+				$script_path = substr($script_path, 0, -1);
+			}
+
+			$script_path = str_replace(array('../', './'), '', $script_path);
+
+			if ($script_path[0] !== '/')
+			{
+				$script_path = '/' . $script_path;
+			}
+		}
+
+		// Check if data is sent
+		if ($this->io_handler->get_input('submit_server', false))
+		{
+			$this->install_config->set('cookie_secure', $cookie_secure);
+			$this->install_config->set('server_protocol', $server_protocol);
+			$this->install_config->set('force_server_vars', $force_server_vars);
+			$this->install_config->set('server_name', $server_name);
+			$this->install_config->set('server_port', $server_port);
+			$this->install_config->set('script_path', $script_path);
+		}
+		else
+		{
+			// Render form
+			$server_form = array(
+				'cookie_secure' => array(
+					'label'			=> 'COOKIE_SECURE',
+					'description'	=> 'COOKIE_SECURE_EXPLAIN',
+					'type'			=> 'radio',
+					'options'		=> array(
+						array(
+							'value'		=> 0,
+							'label'		=> 'NO',
+							'selected'	=> (!$cookie_secure),
+						),
+						array(
+							'value'		=> 1,
+							'label'		=> 'YES',
+							'selected'	=> ($cookie_secure),
+						),
+					),
+				),
+				'force_server_vars' => array(
+					'label'			=> 'FORCE_SERVER_VARS',
+					'description'	=> 'FORCE_SERVER_VARS_EXPLAIN',
+					'type'			=> 'radio',
+					'options'		=> array(
+						array(
+							'value'		=> 0,
+							'label'		=> 'NO',
+							'selected'	=> true,
+						),
+						array(
+							'value'		=> 1,
+							'label'		=> 'YES',
+							'selected'	=> false,
+						),
+					),
+				),
+				'server_protocol' => array(
+					'label'			=> 'SERVER_PROTOCOL',
+					'description'	=> 'SERVER_PROTOCOL_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> $server_protocol,
+				),
+				'server_name' => array(
+					'label'			=> 'SERVER_NAME',
+					'description'	=> 'SERVER_NAME_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> $server_name,
+				),
+				'server_port' => array(
+					'label'			=> 'SERVER_PORT',
+					'description'	=> 'SERVER_PORT_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> $server_port,
+				),
+				'script_path' => array(
+					'label'			=> 'SCRIPT_PATH',
+					'description'	=> 'SCRIPT_PATH_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> $script_path,
+				),
+				'submit_server' => array(
+					'label'	=> 'SUBMIT',
+					'type'	=> 'submit',
+				)
+			);
+
+			$this->io_handler->add_user_form_group('SERVER_CONFIG', $server_form);
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/obtain_data/task/obtain_update_files.php

@@ -0,0 +1,113 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\task_base;
+
+class obtain_update_files extends task_base
+{
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param string				$phpbb_root_path
+	 * @param string				$php_ext
+	 */
+	public function __construct(config $config, iohandler_interface $iohandler, $phpbb_root_path, $php_ext)
+	{
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Load update info file
+		// The file should be checked in the requirements, so we assume that it exists
+		$update_info_file = $this->phpbb_root_path . 'install/update/index.' . $this->php_ext;
+		include($update_info_file);
+		$info = (empty($update_info) || !is_array($update_info)) ? false : $update_info;
+
+		// If the file is invalid, abort mission
+		if (!$info)
+		{
+			$this->iohandler->add_error_message('WRONG_INFO_FILE_FORMAT');
+			throw new user_interaction_required_exception();
+		}
+
+		// Replace .php with $this->php_ext if needed
+		if ($this->php_ext !== 'php')
+		{
+			$custom_extension = '.' . $this->php_ext;
+			$info['files'] = preg_replace('#\.php$#i', $custom_extension, $info['files']);
+		}
+
+		// Save update info
+		$this->installer_config->set('update_info_unprocessed', $info);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/obtain_data/task/obtain_update_ftp_data.php

@@ -0,0 +1,163 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+
+class obtain_update_ftp_data extends task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$installer_config
+	 * @param iohandler_interface	$iohandler
+	 * @param update_helper			$update_helper
+	 * @param string				$php_ext
+	 */
+	public function __construct(config $installer_config, iohandler_interface $iohandler, update_helper $update_helper, $php_ext)
+	{
+		$this->installer_config	= $installer_config;
+		$this->iohandler		= $iohandler;
+		$this->update_helper	= $update_helper;
+		$this->php_ext			= $php_ext;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return ($this->installer_config->get('do_update_files', false) &&
+			($this->installer_config->get('file_update_method', '') === 'ftp')
+		);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if ($this->iohandler->get_input('submit_ftp', false))
+		{
+			$this->update_helper->include_file('includes/functions_transfer.' . $this->php_ext);
+
+			$method = 'ftp';
+			$methods = \transfer::methods();
+			if (!in_array($method, $methods, true))
+			{
+				$method = $methods[0];
+			}
+
+			$ftp_host = $this->iohandler->get_input('ftp_host', '', true);
+			$ftp_user = $this->iohandler->get_input('ftp_user', '', true);
+			$ftp_pass = htmlspecialchars_decode($this->iohandler->get_input('ftp_pass', '', true));
+			$ftp_path = $this->iohandler->get_input('ftp_path', '', true);
+			$ftp_port = $this->iohandler->get_input('ftp_port', 21);
+			$ftp_time = $this->iohandler->get_input('ftp_timeout', 10);
+
+			$this->installer_config->set('ftp_host', $ftp_host);
+			$this->installer_config->set('ftp_user', $ftp_user);
+			$this->installer_config->set('ftp_pass', $ftp_pass);
+			$this->installer_config->set('ftp_path', $ftp_path);
+			$this->installer_config->set('ftp_port', (int) $ftp_port);
+			$this->installer_config->set('ftp_timeout', (int) $ftp_time);
+			$this->installer_config->set('ftp_method', $method);
+		}
+		else
+		{
+			$this->iohandler->add_user_form_group('FTP_SETTINGS', array(
+				'ftp_host'	=> array(
+					'label'			=> 'FTP_HOST',
+					'description'	=> 'FTP_HOST_EXPLAIN',
+					'type'			=> 'text',
+				),
+				'ftp_user'	=> array(
+					'label'			=> 'FTP_USERNAME',
+					'description'	=> 'FTP_USERNAME_EXPLAIN',
+					'type'			=> 'text',
+				),
+				'ftp_pass'	=> array(
+					'label'			=> 'FTP_PASSWORD',
+					'description'	=> 'FTP_PASSWORD_EXPLAIN',
+					'type'			=> 'password',
+				),
+				'ftp_path'	=> array(
+					'label'			=> 'FTP_ROOT_PATH',
+					'description'	=> 'FTP_ROOT_PATH_EXPLAIN',
+					'type'			=> 'text',
+				),
+				'ftp_port'	=> array(
+					'label'			=> 'FTP_PORT',
+					'description'	=> 'FTP_PORT_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> 21,
+				),
+				'ftp_timeout'	=> array(
+					'label'			=> 'FTP_TIMEOUT',
+					'description'	=> 'FTP_TIMEOUT_EXPLAIN',
+					'type'			=> 'text',
+					'default'		=> 10,
+				),
+				'submit_ftp'	=> array(
+					'label'	=> 'SUBMIT',
+					'type'	=> 'submit',
+				),
+			));
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/obtain_data/task/obtain_update_settings.php

@@ -0,0 +1,123 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data\task;
+
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\task_base;
+
+class obtain_update_settings extends task_base
+{
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$installer_config
+	 * @param iohandler_interface	$iohandler
+	 */
+	public function __construct(config $installer_config, iohandler_interface $iohandler)
+	{
+		$this->installer_config	= $installer_config;
+		$this->iohandler		= $iohandler;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Check if data is sent
+		if ($this->iohandler->get_input('submit_update', false))
+		{
+			$update_files = $this->iohandler->get_input('update_type', 'all') === 'all';
+
+			if ($this->installer_config->get('disable_filesystem_update', false) && $update_files)
+			{
+				$this->iohandler->add_error_message('UPDATE_FILES_NOT_FOUND');
+
+				throw new user_interaction_required_exception();
+			}
+
+			$this->installer_config->set('do_update_files', $update_files);
+		}
+		else
+		{
+			if ($this->installer_config->get('disable_filesystem_update', false))
+			{
+				$options[] = array(
+					'value'		=> 'db_only',
+					'label'		=> 'UPDATE_TYPE_DB_ONLY',
+					'selected'	=> true,
+				);
+			}
+			else
+			{
+				$options = array(
+					array(
+						'value'		=> 'all',
+						'label'		=> 'UPDATE_TYPE_ALL',
+						'selected'	=> true,
+					),
+					array(
+						'value'		=> 'db_only',
+						'label'		=> 'UPDATE_TYPE_DB_ONLY',
+						'selected'	=> false,
+					),
+				);
+			}
+
+			$this->iohandler->add_user_form_group('UPDATE_TYPE', array(
+				'update_type' => array(
+					'label'		=> 'UPDATE_TYPE',
+					'type'		=> 'radio',
+					'options'	=> $options,
+				),
+				'submit_update' => array(
+					'label'	=> 'SUBMIT',
+					'type'	=> 'submit',
+				),
+			));
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/obtain_data/update_module.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\obtain_data;
+
+class update_module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('update', 0, 'obtain_data');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		return 0;
+	}
+}

phpbb/install/module/requirements/abstract_requirements_module.php

@@ -0,0 +1,71 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements;
+
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\module_base;
+
+/**
+ * Base class for requirements installer module
+ */
+abstract class abstract_requirements_module extends module_base
+{
+	public function run()
+	{
+		$tests_passed = true;
+		foreach ($this->task_collection as $name => $task)
+		{
+			// Check if we can run the task
+			if (!$task->is_essential() && !$task->check_requirements())
+			{
+				continue;
+			}
+
+			if ($this->allow_progress_bar)
+			{
+				$this->install_config->increment_current_task_progress();
+			}
+
+			$test_result = $task->run();
+			$tests_passed = ($tests_passed) ? $test_result : false;
+		}
+
+		// Module finished, so clear task progress
+		$this->install_config->set_finished_task(0);
+
+		// Check if tests have failed
+		if (!$tests_passed)
+		{
+			// If requirements are not met, exit form installer
+			// Set up UI for retesting
+			$this->iohandler->add_user_form_group('', array(
+				'install'	=> array(
+					'label'	=> 'RETEST_REQUIREMENTS',
+					'type'	=> 'submit',
+				),
+			));
+
+			// Send the response and quit
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		return 0;
+	}
+}

phpbb/install/module/requirements/install_module.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements;
+
+class install_module extends abstract_requirements_module
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('install', 0, 'requirements');
+	}
+}

phpbb/install/module/requirements/task/check_filesystem.php

@@ -0,0 +1,279 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements\task;
+
+/**
+ * Checks filesystem requirements
+ */
+class check_filesystem extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var array
+	 */
+	protected $files_to_check;
+
+	/**
+	 * @var bool
+	 */
+	protected $tests_passed;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $response;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\filesystem\filesystem_interface				$filesystem			filesystem handler
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$response			response helper
+	 * @param string												$phpbb_root_path	relative path to phpBB's root
+	 * @param string												$php_ext			extension of php files
+	 * @param bool													$check_config_php	Whether or not to check if config.php is writable
+	 */
+	public function __construct(\phpbb\filesystem\filesystem_interface $filesystem, \phpbb\install\helper\iohandler\iohandler_interface $response, $phpbb_root_path, $php_ext, $check_config_php = true)
+	{
+		parent::__construct(true);
+
+		$this->filesystem		= $filesystem;
+		$this->response			= $response;
+		$this->phpbb_root_path	= $phpbb_root_path;
+
+		$this->tests_passed = false;
+
+		// Files/Directories to check
+		// All file/directory names must be relative to phpBB's root path
+		$this->files_to_check = array(
+			array(
+				'path' => 'cache/',
+				'failable' => false,
+				'is_file' => false,
+			),
+			array(
+				'path' => 'store/',
+				'failable' => false,
+				'is_file' => false,
+			),
+			array(
+				'path' => 'files/',
+				'failable' => false,
+				'is_file' => false,
+			),
+			array(
+				'path' => 'images/avatars/upload/',
+				'failable' => true,
+				'is_file' => false,
+			),
+		);
+
+		if ($check_config_php)
+		{
+			$this->files_to_check[] = array(
+				'path' => "config.$php_ext",
+				'failable' => false,
+				'is_file' => true,
+			);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->tests_passed = true;
+
+		// Check files/directories to be writable
+		foreach ($this->files_to_check as $file)
+		{
+			if ($file['is_file'])
+			{
+				$this->check_file($file['path'], $file['failable']);
+			}
+			else
+			{
+				$this->check_dir($file['path'], $file['failable']);
+			}
+		}
+
+		return $this->tests_passed;
+	}
+
+	/**
+	 * Sets $this->tests_passed
+	 *
+	 * @param	bool	$is_passed
+	 */
+	protected function set_test_passed($is_passed)
+	{
+		// If one test failed, tests_passed should be false
+		$this->tests_passed = (!$this->tests_passed) ? false : $is_passed;
+	}
+
+	/**
+	 * Check if a file is readable and writable
+	 *
+	 * @param string	$file		Filename
+	 * @param bool		$failable	Whether failing test should interrupt installation process
+	 */
+	protected function check_file($file, $failable = false)
+	{
+		$path = $this->phpbb_root_path . $file;
+		$exists = $writable = true;
+
+		// Try to create file if it does not exists
+		if (!file_exists($path))
+		{
+			$fp = @fopen($path, 'w');
+			@fclose($fp);
+			try
+			{
+				$this->filesystem->phpbb_chmod($path,
+					\phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE
+				);
+				$exists = true;
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing
+			}
+		}
+
+		if (file_exists($path))
+		{
+			if (!$this->filesystem->is_writable($path))
+			{
+				$writable = false;
+			}
+		}
+		else
+		{
+			$exists = $writable = false;
+		}
+
+		$this->set_test_passed(($exists && $writable) || $failable);
+
+		if (!($exists && $writable))
+		{
+			$title = ($exists) ? 'FILE_NOT_WRITABLE' : 'FILE_NOT_EXISTS';
+			$lang_suffix = '_EXPLAIN';
+			$lang_suffix .= ($failable) ? '_OPTIONAL' : '';
+			$description = array($title . $lang_suffix, $file);
+
+			if ($failable)
+			{
+				$this->response->add_warning_message($title, $description);
+			}
+			else
+			{
+				$this->response->add_error_message($title, $description);
+			}
+		}
+	}
+
+	/**
+	 * Check if a directory is readable and writable
+	 *
+	 * @param string	$dir		Filename
+	 * @param bool		$failable	Whether failing test should abort the installation process
+	 */
+	protected function check_dir($dir, $failable = false)
+	{
+		$path = $this->phpbb_root_path . $dir;
+		$exists = $writable = false;
+
+		// Try to create the directory if it does not exist
+		if (!file_exists($path))
+		{
+			try
+			{
+				$this->filesystem->mkdir($path, 0777);
+				$this->filesystem->phpbb_chmod($path,
+					\phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE
+				);
+				$exists = true;
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing
+			}
+		}
+
+		// Now really check
+		if (file_exists($path) && is_dir($path))
+		{
+			try
+			{
+				$exists = true;
+				$this->filesystem->phpbb_chmod($path,
+					\phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE
+				);
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing
+			}
+		}
+
+		if ($this->filesystem->is_writable($path))
+		{
+			$writable = true;
+		}
+
+		$this->set_test_passed(($exists && $writable) || $failable);
+
+		if (!($exists && $writable))
+		{
+			$title = ($exists) ? 'DIRECTORY_NOT_WRITABLE' : 'DIRECTORY_NOT_EXISTS';
+			$lang_suffix = '_EXPLAIN';
+			$lang_suffix .= ($failable) ? '_OPTIONAL' : '';
+			$description = array($title . $lang_suffix, $dir);
+
+			if ($failable)
+			{
+				$this->response->add_warning_message($title, $description);
+			}
+			else
+			{
+				$this->response->add_error_message($title, $description);
+			}
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/requirements/task/check_server_environment.php

@@ -0,0 +1,209 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements\task;
+
+/**
+ * Installer task that checks if the server meats phpBB requirements
+ */
+class check_server_environment extends \phpbb\install\task_base
+{
+	/**
+	 * @var \phpbb\install\helper\database
+	 */
+	protected $database_helper;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $response_helper;
+
+	/**
+	 * @var bool
+	 */
+	protected $tests_passed;
+
+	/**
+	 * Constructor
+	 *
+	 * @param	\phpbb\install\helper\database	$database_helper
+	 * @param	\phpbb\install\helper\iohandler\iohandler_interface	$response
+	 */
+	public function __construct(\phpbb\install\helper\database $database_helper,
+								\phpbb\install\helper\iohandler\iohandler_interface $response)
+	{
+		$this->database_helper	= $database_helper;
+		$this->response_helper	= $response;
+		$this->tests_passed		= true;
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		//
+		// Check requirements
+		// The error messages should be set in the check_ functions
+		//
+
+		// Check PHP version
+		$this->check_php_version();
+
+		// Check for getimagesize()
+		$this->check_image_size();
+
+		// Check for PCRE support
+		$this->check_pcre();
+
+		// Check for JSON support
+		$this->check_json();
+
+		// XML extension support check
+		$this->check_xml();
+
+		// Check for dbms support
+		$this->check_available_dbms();
+
+		return $this->tests_passed;
+	}
+
+	/**
+	 * Sets $this->tests_passed
+	 *
+	 * @param	bool	$is_passed
+	 */
+	protected function set_test_passed($is_passed)
+	{
+		// If one test failed, tests_passed should be false
+		$this->tests_passed = (!$this->tests_passed) ? false : $is_passed;
+	}
+
+	/**
+	 * Check if the requirements for PHP version is met
+	 */
+	protected function check_php_version()
+	{
+		$php_version = PHP_VERSION;
+
+		if (version_compare($php_version, '5.4') < 0)
+		{
+			$this->response_helper->add_error_message('PHP_VERSION_REQD', 'PHP_VERSION_REQD_EXPLAIN');
+
+			$this->set_test_passed(false);
+			return;
+		}
+
+		$this->set_test_passed(true);
+	}
+
+	/**
+	 * Checks if the installed PHP has getimagesize() available
+	 */
+	protected function check_image_size()
+	{
+		if (!@function_exists('getimagesize'))
+		{
+			$this->response_helper->add_error_message('PHP_GETIMAGESIZE_SUPPORT', 'PHP_GETIMAGESIZE_SUPPORT_EXPLAIN');
+
+			$this->set_test_passed(false);
+			return;
+		}
+
+		$this->set_test_passed(true);
+	}
+
+	/**
+	 * Checks if the installed PHP supports PCRE
+	 */
+	protected function check_pcre()
+	{
+		if (@preg_match('//u', ''))
+		{
+			$this->set_test_passed(true);
+			return;
+		}
+
+		$this->response_helper->add_error_message('PCRE_UTF_SUPPORT', 'PCRE_UTF_SUPPORT_EXPLAIN');
+
+		$this->set_test_passed(false);
+	}
+
+	/**
+	 * Checks whether PHP's JSON extension is available or not
+	 */
+	protected function check_json()
+	{
+		if (@extension_loaded('json'))
+		{
+			$this->set_test_passed(true);
+			return;
+		}
+
+		$this->response_helper->add_error_message('PHP_JSON_SUPPORT', 'PHP_JSON_SUPPORT_EXPLAIN');
+
+		$this->set_test_passed(false);
+	}
+
+	/**
+	 * Checks whether or not the XML PHP extension is available (Required by the text formatter)
+	 */
+	protected function check_xml()
+	{
+		if (class_exists('DOMDocument'))
+		{
+			$this->set_test_passed(true);
+			return;
+		}
+
+		$this->response_helper->add_error_message('PHP_XML_SUPPORT', 'PHP_XML_SUPPORT_EXPLAIN');
+
+		$this->set_test_passed(false);
+	}
+
+	/**
+	 * Check if any supported DBMS is available
+	 */
+	protected function check_available_dbms()
+	{
+		$available_dbms = $this->database_helper->get_available_dbms(false, true);
+
+		if ($available_dbms['ANY_DB_SUPPORT'])
+		{
+			$this->set_test_passed(true);
+			return;
+		}
+
+		$this->response_helper->add_error_message('PHP_SUPPORTED_DB', 'PHP_SUPPORTED_DB_EXPLAIN');
+
+		$this->set_test_passed(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/requirements/task/check_update.php

@@ -0,0 +1,198 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements\task;
+
+use phpbb\filesystem\filesystem;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+
+/**
+ * Check the availability of updater files and update version
+ */
+class check_update extends task_base
+{
+	/**
+	 * @var \phpbb\config\db
+	 */
+	protected $config;
+
+	/**
+	 * @var filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var \phpbb\version_helper
+	 */
+	protected $version_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var bool
+	 */
+	protected $tests_passed;
+
+	/**
+	 * Constructor
+	 *
+	 * @param container_factory		$container
+	 * @param filesystem			$filesystem
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param update_helper			$update_helper
+	 * @param string				$phpbb_root_path
+	 * @param string				$php_ext
+	 */
+	public function __construct(container_factory $container, filesystem $filesystem, config $config, iohandler_interface $iohandler, update_helper $update_helper, $phpbb_root_path, $php_ext)
+	{
+		$this->filesystem		= $filesystem;
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+		$this->tests_passed		= true;
+
+		$this->config			= $container->get('config');
+		$this->version_helper	= $container->get('version_helper');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * Sets $this->tests_passed
+	 *
+	 * @param	bool	$is_passed
+	 */
+	protected function set_test_passed($is_passed)
+	{
+		// If one test failed, tests_passed should be false
+		$this->tests_passed = $this->tests_passed && $is_passed;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Array of update files
+		$update_files = array(
+			$this->phpbb_root_path . 'install/update',
+			$this->phpbb_root_path . 'install/update/index.' . $this->php_ext,
+		);
+
+		// Check for a valid update directory
+		if (!$this->filesystem->exists($update_files) || !$this->filesystem->is_readable($update_files))
+		{
+			if ($this->iohandler->get_input('update_type', 'all') === 'all')
+			{
+				$this->iohandler->add_warning_message('UPDATE_FILES_NOT_FOUND');
+				$this->set_test_passed(false);
+			}
+
+			// If there are no update files, we can't check the version etc
+			// However, we can let the users run migrations if they really want to...
+			$this->installer_config->set('disable_filesystem_update', true);
+			return true;
+		}
+
+		// Recover version numbers
+		$update_info = array();
+		@include($this->phpbb_root_path . 'install/update/index.' . $this->php_ext);
+		$info = (empty($update_info) || !is_array($update_info)) ? false : $update_info;
+		$update_version = false;
+
+		if ($info !== false)
+		{
+			$update_version = (!empty($info['version']['to'])) ? trim($info['version']['to']) : false;
+		}
+
+		// Get current and latest version
+		try
+		{
+			$latest_version = $this->version_helper->get_latest_on_current_branch(true);
+		}
+		catch (\RuntimeException $e)
+		{
+			$latest_version = $update_version;
+		}
+
+		$current_version = (!empty($this->config['version_update_from'])) ? $this->config['version_update_from'] : $this->config['version'];
+
+		// Check if the update package
+		if (!$this->update_helper->phpbb_version_compare($current_version, $update_version, '<'))
+		{
+			$this->iohandler->add_error_message('NO_UPDATE_FILES_UP_TO_DATE');
+			$this->tests_passed = false;
+		}
+
+		// Check if the update package works with the installed version
+		if (empty($info['version']['from']) || $info['version']['from'] !== $current_version)
+		{
+			$this->iohandler->add_error_message(array('INCOMPATIBLE_UPDATE_FILES', $current_version, $info['version']['from'], $update_version));
+			$this->tests_passed = false;
+		}
+
+		// check if this is the latest update package
+		if ($this->update_helper->phpbb_version_compare($update_version, $latest_version, '<'))
+		{
+			$this->iohandler->add_warning_message(array('OLD_UPDATE_FILES', $info['version']['from'], $update_version, $latest_version));
+		}
+
+		return $this->tests_passed;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/requirements/update_module.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\requirements;
+
+class update_module extends abstract_requirements_module
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('update', 0, 'requirements');
+	}
+}

phpbb/install/module/update_database/module.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_database;
+
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('update', 0, 'update_database');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		return 0;
+	}
+}

phpbb/install/module/update_database/task/update.php

@@ -0,0 +1,234 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_database\task;
+
+use phpbb\db\migration\exception;
+use phpbb\db\output_handler\installer_migrator_output_handler;
+use phpbb\db\output_handler\log_wrapper_migrator_output_handler;
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\task_base;
+
+/**
+ * Database updater task
+ */
+class update extends task_base
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var \phpbb\config\config
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\extension\manager
+	 */
+	protected $extension_manager;
+
+	/**
+	 * @var \phpbb\filesystem\filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var \phpbb\install\helper\config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\install\helper\iohandler\iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var \phpbb\log\log
+	 */
+	protected $log;
+
+	/**
+	 * @var \phpbb\db\migrator
+	 */
+	protected $migrator;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param \phpbb\install\helper\container_factory				$container
+	 * @param \phpbb\filesystem\filesystem							$filesystem
+	 * @param \phpbb\install\helper\config							$installer_config
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface	$iohandler
+	 * @param \phpbb\language\language								$language
+	 * @param string												$phpbb_root_path
+	 */
+	public function __construct(\phpbb\install\helper\container_factory $container, \phpbb\filesystem\filesystem $filesystem, \phpbb\install\helper\config $installer_config, \phpbb\install\helper\iohandler\iohandler_interface $iohandler, \phpbb\language\language $language, $phpbb_root_path)
+	{
+		$this->filesystem			= $filesystem;
+		$this->installer_config		= $installer_config;
+		$this->iohandler			= $iohandler;
+		$this->language				= $language;
+		$this->phpbb_root_path		= $phpbb_root_path;
+
+		$this->cache				= $container->get('cache.driver');
+		$this->config				= $container->get('config');
+		$this->extension_manager	= $container->get('ext.manager');
+		$this->log					= $container->get('log');
+		$this->migrator				= $container->get('migrator');
+		$this->user					= $container->get('user');
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->language->add_lang('migrator');
+
+		if (!isset($this->config['version_update_from']))
+		{
+			$this->config->set('version_update_from', $this->config['version']);
+		}
+
+		$original_version = $this->config['version_update_from'];
+
+		$this->migrator->set_output_handler(
+			new log_wrapper_migrator_output_handler(
+				$this->language,
+				new installer_migrator_output_handler($this->iohandler),
+				$this->phpbb_root_path . 'store/migrations_' . time() . '.log',
+				$this->filesystem
+			)
+		);
+
+		$this->migrator->create_migrations_table();
+
+		$migrations = $this->extension_manager
+			->get_finder()
+			->core_path('phpbb/db/migration/data/')
+			->extension_directory('/migrations')
+			->get_classes();
+
+		$this->migrator->set_migrations($migrations);
+
+		$migration_step_count = $this->installer_config->get('database_update_migration_steps', -1);
+		if ($migration_step_count < 0)
+		{
+			$migration_step_count = count($this->migrator->get_installable_migrations()) * 2;
+			$this->installer_config->set('database_update_migration_steps', $migration_step_count);
+		}
+
+		$progress_count = $this->installer_config->get('database_update_count', 0);
+		$restart_progress_bar = ($progress_count === 0); // Only "restart" when the update runs for the first time
+		$this->iohandler->set_task_count($migration_step_count, $restart_progress_bar);
+		$this->installer_config->set_task_progress_count($migration_step_count);
+
+		while (!$this->migrator->finished())
+		{
+			try
+			{
+				$this->migrator->update();
+				$progress_count++;
+
+				$last_run_migration = $this->migrator->get_last_run_migration();
+				if (isset($last_run_migration['effectively_installed']) && $last_run_migration['effectively_installed'])
+				{
+					// We skipped two step, so increment $progress_count by another one
+					$progress_count++;
+				}
+				else if (($last_run_migration['task'] === 'process_schema_step' && !$last_run_migration['state']['migration_schema_done']) ||
+					($last_run_migration['task'] === 'process_data_step' && !$last_run_migration['state']['migration_data_done']))
+				{
+					// We just run a step that wasn't counted yet so make it count
+					$migration_step_count++;
+				}
+
+				$this->iohandler->set_task_count($migration_step_count);
+				$this->installer_config->set_task_progress_count($migration_step_count);
+				$this->iohandler->set_progress('STAGE_UPDATE_DATABASE', $progress_count);
+			}
+			catch (exception $e)
+			{
+				$msg = $e->getParameters();
+				array_unshift($msg, $e->getMessage());
+
+				$this->iohandler->add_error_message($msg);
+				throw new user_interaction_required_exception();
+			}
+
+			if ($this->installer_config->get_time_remaining() <= 0 || $this->installer_config->get_memory_remaining() <= 0)
+			{
+				$this->installer_config->set('database_update_count', $progress_count);
+				$this->installer_config->set('database_update_migration_steps', $migration_step_count);
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		if ($original_version !== $this->config['version'])
+		{
+			$this->log->add(
+				'admin',
+				(isset($this->user->data['user_id'])) ? $this->user->data['user_id'] : ANONYMOUS,
+				$this->user->ip,
+				'LOG_UPDATE_DATABASE',
+				false,
+				array(
+					$original_version,
+					$this->config['version']
+				)
+			);
+		}
+
+		$this->iohandler->add_success_message('INLINE_UPDATE_SUCCESSFUL');
+
+		$this->cache->purge();
+
+		$this->config->increment('assets_version', 1);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/update_database/task/update_extensions.php

@@ -0,0 +1,263 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_database\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+use Symfony\Component\Finder\Finder;
+
+/**
+ * Installs extensions that exist in ext folder upon install
+ */
+class update_extensions extends task_base
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/** @var update_helper */
+	protected $update_helper;
+
+	/**
+	 * @var \phpbb\config\db
+	 */
+	protected $config;
+
+	/**
+	 * @var \phpbb\log\log_interface
+	 */
+	protected $log;
+
+	/**
+	 * @var \phpbb\user
+	 */
+	protected $user;
+
+	/** @var \phpbb\extension\manager */
+	protected $extension_manager;
+
+	/** @var Finder */
+	protected $finder;
+
+	/** @var string Extension table */
+	protected $extension_table;
+
+	/** @var \phpbb\db\driver\driver_interface */
+	protected $db;
+
+	/**
+	 * @var array	List of default extensions to update, grouped by version
+	 *				they were added
+	 */
+	static public $default_extensions_update = [
+		'3.2.0-RC2' => ['phpbb/viglink']
+	];
+
+	/**
+	 * Constructor
+	 *
+	 * @param container_factory			$container
+	 * @param config					$install_config
+	 * @param iohandler_interface		$iohandler
+	 * @param $update_helper			$update_helper
+	 * @param string					$phpbb_root_path phpBB root path
+	 */
+	public function __construct(container_factory $container, config $install_config, iohandler_interface $iohandler, update_helper $update_helper, $phpbb_root_path)
+	{
+		$this->install_config	= $install_config;
+		$this->iohandler		= $iohandler;
+		$this->extension_table = $container->get_parameter('tables.ext');
+
+		$this->log				= $container->get('log');
+		$this->user				= $container->get('user');
+		$this->extension_manager = $container->get('ext.manager');
+		$this->cache				= $container->get('cache.driver');
+		$this->config			= $container->get('config');
+		$this->db				= $container->get('dbal.conn');
+		$this->update_helper = $update_helper;
+		$this->finder = new Finder();
+		$this->finder->in($phpbb_root_path . 'ext/')
+			->ignoreUnreadableDirs()
+			->depth('< 3')
+			->files()
+			->name('composer.json');
+
+		// Make sure asset version exists in config. Otherwise we might try to
+		// insert the assets_version setting into the database and cause a
+		// duplicate entry error.
+		if (!isset($this->config['assets_version']))
+		{
+			$this->config['assets_version'] = 0;
+		}
+
+		parent::__construct(true);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$this->user->session_begin();
+		$this->user->setup(array('common', 'acp/common', 'cli'));
+
+		$update_info = $this->install_config->get('update_info_unprocessed', []);
+		$version_from = !empty($update_info) ? $update_info['version']['from'] : $this->config['version_update_from'];
+
+		if (!empty($version_from))
+		{
+			$update_extensions = $this->iohandler->get_input('update-extensions', []);
+
+			// Create list of default extensions that need to be enabled in update
+			$default_update_extensions = [];
+			foreach (self::$default_extensions_update as $version => $extensions)
+			{
+				if ($this->update_helper->phpbb_version_compare($version_from, $version, '<'))
+				{
+					$default_update_extensions = array_merge($default_update_extensions, $extensions);
+				}
+			}
+
+			$all_available_extensions = $this->extension_manager->all_available();
+			$i = $this->install_config->get('update_extensions_index', 0);
+			$available_extensions = array_slice($all_available_extensions, $i);
+
+			// Update available extensions
+			foreach ($available_extensions as $ext_name => $ext_path)
+			{
+				// Update extensions if:
+				//	1) Extension is currently enabled
+				//	2) Extension was implicitly defined as needing an update
+				//	3) Extension was newly added as default phpBB extension in
+				//		this update and should be enabled by default.
+				if ($this->extension_manager->is_enabled($ext_name) ||
+					in_array($ext_name, $update_extensions) ||
+					in_array($ext_name, $default_update_extensions)
+				)
+				{
+					try
+					{
+						$extension_enabled = $this->extension_manager->is_enabled($ext_name);
+						if ($extension_enabled)
+						{
+							$this->extension_manager->disable($ext_name);
+						}
+						$this->extension_manager->enable($ext_name);
+						$extensions = $this->get_extensions();
+
+						if (isset($extensions[$ext_name]) && $extensions[$ext_name]['ext_active'])
+						{
+							// Create log
+							$this->log->add('admin', ANONYMOUS, '', 'LOG_EXT_UPDATE', time(), array($ext_name));
+							$this->iohandler->add_success_message(array('CLI_EXTENSION_UPDATE_SUCCESS', $ext_name));
+						}
+						else
+						{
+							$this->iohandler->add_log_message('CLI_EXTENSION_UPDATE_FAILURE', array($ext_name));
+						}
+
+						// Disable extensions if it was disabled by the admin before
+						if (!$extension_enabled && !in_array($ext_name, $default_update_extensions))
+						{
+							$this->extension_manager->disable($ext_name);
+						}
+					}
+					catch (\Exception $e)
+					{
+						// Add fail log and continue
+						$this->iohandler->add_log_message('CLI_EXTENSION_UPDATE_FAILURE', array($ext_name));
+					}
+				}
+
+				$i++;
+
+				// Stop execution if resource limit is reached
+				if ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0)
+				{
+					break;
+				}
+			}
+
+			$this->install_config->set('update_extensions_index', $i);
+
+			if ($i < count($all_available_extensions))
+			{
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		$this->config->delete('version_update_from');
+
+		$this->cache->purge();
+
+		$this->config->increment('assets_version', 1);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 1;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return 'TASK_UPDATE_EXTENSIONS';
+	}
+
+	/**
+	 * Get extensions from database
+	 *
+	 * @return array List of extensions
+	 */
+	private function get_extensions()
+	{
+		$sql = 'SELECT *
+			FROM ' . $this->extension_table;
+
+		$result = $this->db->sql_query($sql);
+		$extensions_row = $this->db->sql_fetchrowset($result);
+		$this->db->sql_freeresult($result);
+
+		$extensions = array();
+
+		foreach ($extensions_row as $extension)
+		{
+			$extensions[$extension['ext_name']] = $extension;
+		}
+
+		ksort($extensions);
+
+		return $extensions;
+	}
+}

phpbb/install/module/update_filesystem/module.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem;
+
+class module extends \phpbb\install\module_base
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_navigation_stage_path()
+	{
+		return array('update', 0, 'update_files');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		return 0;
+	}
+}

phpbb/install/module/update_filesystem/task/diff_files.php

@@ -0,0 +1,253 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem\task;
+
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+
+/**
+ * Merges user made changes into the files
+ */
+class diff_files extends task_base
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param container_factory		$container
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param update_helper			$update_helper
+	 * @param string				$phpbb_root_path
+	 * @param string				$php_ext
+	 */
+	public function __construct(container_factory $container, config $config, iohandler_interface $iohandler, update_helper $update_helper, $phpbb_root_path, $php_ext)
+	{
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+		$this->php_ext			= $php_ext;
+
+		$this->cache			= $container->get('cache.driver');
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		$files_to_diff = $this->installer_config->get('update_files', array());
+		$files_to_diff = (isset($files_to_diff['update_with_diff'])) ? $files_to_diff['update_with_diff'] : array();
+
+		return $this->installer_config->get('do_update_files', false) && count($files_to_diff) > 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Include diff engine
+		$this->update_helper->include_file('includes/diff/diff.' . $this->php_ext);
+		$this->update_helper->include_file('includes/diff/engine.' . $this->php_ext);
+
+		// Set up basic vars
+		$old_path = $this->update_helper->get_path_to_old_update_files();
+		$new_path = $this->update_helper->get_path_to_new_update_files();
+
+		$update_files = $this->installer_config->get('update_files', array());
+		$files_to_diff = $update_files['update_with_diff'];
+
+		// Set progress bar
+		$this->iohandler->set_task_count(count($files_to_diff), true);
+		$this->iohandler->set_progress('UPDATE_FILE_DIFF', 0);
+		$progress_count = $this->installer_config->get('file_diff_update_count', 0);
+
+		// Recover progress
+		$progress_key = $this->installer_config->get('differ_progress_key', -1);
+		$progress_recovered = ($progress_key === -1);
+		$merge_conflicts = $this->installer_config->get('merge_conflict_list', array());
+
+		foreach ($files_to_diff as $key => $filename)
+		{
+			if ($progress_recovered === false)
+			{
+				if ($progress_key === $key)
+				{
+					$progress_recovered = true;
+				}
+
+				continue;
+			}
+
+			// Read in files' content
+			$file_contents = array();
+
+			// Handle the special case when user created a file with the filename that is now new in the core
+			if (file_exists($old_path . $filename))
+			{
+				$file_contents[0] = file_get_contents($old_path . $filename);
+
+				$filenames = array(
+					$this->phpbb_root_path . $filename,
+					$new_path . $filename
+				);
+
+				foreach ($filenames as $file_to_diff)
+				{
+					$file_contents[] = file_get_contents($file_to_diff);
+
+					if ($file_contents[count($file_contents) - 1] === false)
+					{
+						$this->iohandler->add_error_message(array('FILE_DIFFER_ERROR_FILE_CANNOT_BE_READ', $files_to_diff));
+						unset($file_contents);
+						throw new user_interaction_required_exception();
+					}
+				}
+
+				$diff = new \diff3($file_contents[0], $file_contents[1], $file_contents[2]);
+
+				// Handle conflicts
+				if ($diff->get_num_conflicts() !== 0)
+				{
+					$merge_conflicts[] = $filename;
+				}
+
+				if ($diff->merged_output() !== $file_contents[1])
+				{
+					// Save merged output
+					$this->cache->put(
+						'_file_' . md5($filename),
+						base64_encode(implode("\n", $diff->merged_output()))
+					);
+				}
+				else
+				{
+					unset($update_files['update_with_diff'][$key]);
+				}
+
+				unset($file_contents);
+				unset($diff);
+			}
+			else
+			{
+				$new_file_content = file_get_contents($new_path . $filename);
+
+				if ($new_file_content === false)
+				{
+					$this->iohandler->add_error_message(array('FILE_DIFFER_ERROR_FILE_CANNOT_BE_READ', $files_to_diff));
+					unset($new_file_content );
+					throw new user_interaction_required_exception();
+				}
+
+				// Save new file content to cache
+				$this->cache->put(
+					'_file_' . md5($filename),
+					base64_encode($new_file_content)
+				);
+				unset($new_file_content);
+			}
+
+			$progress_count++;
+			$this->iohandler->set_progress('UPDATE_FILE_DIFF', $progress_count);
+
+			if ($this->installer_config->get_time_remaining() <= 0 || $this->installer_config->get_memory_remaining() <= 0)
+			{
+				// Save differ progress
+				$this->installer_config->set('differ_progress_key', $key);
+				$this->installer_config->set('merge_conflict_list', $merge_conflicts);
+				$this->installer_config->set('file_diff_update_count', $progress_count);
+
+				foreach ($update_files as $type => $files)
+				{
+					if (empty($files))
+					{
+						unset($update_files[$type]);
+					}
+				}
+
+				$this->installer_config->set('update_files', $update_files);
+
+				// Request refresh
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		$this->iohandler->finish_progress('ALL_FILES_DIFFED');
+		$this->installer_config->set('merge_conflict_list', $merge_conflicts);
+
+		foreach ($update_files as $type => $files)
+		{
+			if (empty($files))
+			{
+				unset($update_files[$type]);
+			}
+		}
+
+		$this->installer_config->set('update_files', $update_files);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/update_filesystem/task/download_updated_files.php

@@ -0,0 +1,133 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem\task;
+
+use phpbb\filesystem\filesystem;
+use phpbb\install\exception\jump_to_restart_point_exception;
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\task_base;
+
+class download_updated_files extends task_base
+{
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param filesystem			$filesystem
+	 */
+	public function __construct(config $config, iohandler_interface $iohandler, filesystem $filesystem)
+	{
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->filesystem		= $filesystem;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false)
+			&& $this->installer_config->get('file_update_method', '') === 'compression';
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if ($this->iohandler->get_input('database_update_submit', false))
+		{
+			// Remove archive
+			$this->filesystem->remove(
+				$this->installer_config->get('update_file_archive', null)
+			);
+
+			$this->installer_config->set('update_file_archive', null);
+		}
+		else if ($this->iohandler->get_input('update_recheck_files_submit', false))
+		{
+			$this->installer_config->set('file_updater_elem_progress', '');
+			$this->installer_config->set('update_files', array());
+			throw new jump_to_restart_point_exception('check_update_files');
+		}
+		else
+		{
+			$file_update_info = $this->installer_config->get('update_files', array());
+
+			// Display download box only if the archive won't be empty
+			if (!empty($file_update_info) && !(isset($file_update_info['delete']) && count($file_update_info) == 1))
+			{
+				// Render download box
+				$this->iohandler->add_download_link(
+					'phpbb_installer_update_file_download',
+					'DOWNLOAD_UPDATE_METHOD',
+					'DOWNLOAD_UPDATE_METHOD_EXPLAIN'
+				);
+			}
+
+			// Add form to continue update
+			$this->iohandler->add_user_form_group('UPDATE_CONTINUE_UPDATE_PROCESS', array(
+				'update_recheck_files_submit'	=> array(
+					'label'			=> 'UPDATE_RECHECK_UPDATE_FILES',
+					'type'			=> 'submit',
+					'is_secondary'	=> empty($file_update_info),
+				),
+				'database_update_submit'	=> array(
+					'label'		=> 'UPDATE_CONTINUE_UPDATE_PROCESS',
+					'type'		=> 'submit',
+					'disabled'	=> !empty($file_update_info),
+				),
+			));
+
+			throw new user_interaction_required_exception();
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/update_filesystem/task/file_check.php

@@ -0,0 +1,248 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem\task;
+
+use phpbb\filesystem\filesystem;
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+
+/**
+ * Updater task performing file checking
+ */
+class file_check extends task_base
+{
+	/**
+	 * @var filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Construct
+	 *
+	 * @param filesystem			$filesystem
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param update_helper			$update_helper
+	 * @param string				$phpbb_root_path
+	 */
+	public function __construct(filesystem $filesystem, config $config, iohandler_interface $iohandler, update_helper $update_helper, $phpbb_root_path)
+	{
+		$this->filesystem		= $filesystem;
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if (!$this->installer_config->has_restart_point('check_update_files'))
+		{
+			$this->installer_config->create_progress_restart_point('check_update_files');
+		}
+
+		$old_path = $this->update_helper->get_path_to_old_update_files();
+		$new_path = $this->update_helper->get_path_to_new_update_files();
+
+		$update_info = $this->installer_config->get('update_info', array());
+		$file_update_info = $this->installer_config->get('update_files', array());
+
+		if (empty($update_info))
+		{
+			$root_path = $this->phpbb_root_path;
+
+			$update_info = $this->installer_config->get('update_info_unprocessed', array());
+
+			$file_update_info = array();
+			$file_update_info['update_without_diff'] = array_diff($update_info['binary'], $update_info['deleted']);
+
+			foreach ($file_update_info['update_without_diff'] as $key => $binary_file)
+			{
+				$new_file = $new_path . $binary_file;
+				$file = $this->phpbb_root_path . $binary_file;
+
+				if (!$this->filesystem->exists($file))
+				{
+					continue;
+				}
+
+				if (md5_file($file) === md5_file($new_file))
+				{
+					// File already up to date
+					unset($file_update_info['update_without_diff'][$key]);
+				}
+			}
+
+			// Remove update without diff info if empty
+			if (count($file_update_info['update_without_diff']) < 1)
+			{
+				unset($file_update_info['update_without_diff']);
+			}
+
+			// Filter out files that are already deleted
+			$file_update_info['delete'] = array_filter(
+				$update_info['deleted'],
+				function ($filename) use ($root_path)
+				{
+					return file_exists($root_path . $filename);
+				}
+			);
+
+			// Remove files to delete list if empty
+			if (count($file_update_info['delete']) < 1)
+			{
+				unset($file_update_info['delete']);
+			}
+		}
+
+		$progress_count = $this->installer_config->get('file_check_progress_count', 0);
+		$task_count = count($update_info['files']);
+		$this->iohandler->set_task_count($task_count);
+		$this->iohandler->set_progress('UPDATE_CHECK_FILES', 0);
+
+		// Create list of default extensions that should have been added prior
+		// to this update
+		$default_update_extensions = [];
+		foreach (\phpbb\install\module\update_database\task\update_extensions::$default_extensions_update as $version => $extensions)
+		{
+			if ($this->update_helper->phpbb_version_compare($update_info['version']['from'], $version, '>='))
+			{
+				$default_update_extensions = array_merge($default_update_extensions, $extensions);
+			}
+		}
+
+		foreach ($update_info['files'] as $key => $filename)
+		{
+			$old_file = $old_path . $filename;
+			$new_file = $new_path . $filename;
+			$file = $this->phpbb_root_path . $filename;
+
+			if ($this->installer_config->get_time_remaining() <= 0 || $this->installer_config->get_memory_remaining() <= 0)
+			{
+				// Save progress
+				$this->installer_config->set('update_info', $update_info);
+				$this->installer_config->set('file_check_progress_count', $progress_count);
+				$this->installer_config->set('update_files', $file_update_info);
+
+				// Request refresh
+				throw new resource_limit_reached_exception();
+			}
+
+			$progress_count++;
+			$this->iohandler->set_progress('UPDATE_CHECK_FILES', $progress_count);
+
+			// Do not copy default extension again if the previous version was
+			// packaged with it but it does not exist (e.g. deleted by admin)
+			if (strpos($file, $this->phpbb_root_path . 'ext/') !== false)
+			{
+				$skip_file = false;
+				foreach ($default_update_extensions as $ext_name)
+				{
+					if (strpos($file, $this->phpbb_root_path . 'ext/' . $ext_name) !== false &&
+						!$this->filesystem->exists($this->phpbb_root_path . 'ext/' . $ext_name . '/composer.json'))
+					{
+						$skip_file = true;
+						break;
+					}
+				}
+
+				if ($skip_file)
+				{
+					continue;
+				}
+			}
+
+			if (!$this->filesystem->exists($file))
+			{
+				$file_update_info['new'][] = $filename;
+			}
+			else
+			{
+				$file_checksum = md5_file($file);
+
+				if ($file_checksum === md5_file($new_file))
+				{
+					// File already up to date
+					continue;
+				}
+				else if ($this->filesystem->exists($old_file) && $file_checksum === md5_file($old_file))
+				{
+					// No need to diff the file
+					$file_update_info['update_without_diff'][] = $filename;
+				}
+				else
+				{
+					$file_update_info['update_with_diff'][] = $filename;
+				}
+			}
+
+			unset($update_info['files'][$key]);
+		}
+
+		$this->installer_config->set('update_files', $file_update_info);
+		$this->installer_config->set('update_info', array());
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/update_filesystem/task/show_file_status.php

@@ -0,0 +1,170 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem\task;
+
+use phpbb\filesystem\filesystem;
+use phpbb\install\exception\user_interaction_required_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\file_updater\factory;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\task_base;
+
+class show_file_status extends task_base
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var filesystem
+	 */
+	protected $filesystem;
+
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var \phpbb\install\helper\file_updater\compression_file_updater
+	 */
+	protected $file_updater;
+
+	/**
+	 * Constructor
+	 *
+	 * @param container_factory		$container
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param filesystem			$filesystem
+	 * @param factory				$file_updater_factory
+	 */
+	public function __construct(container_factory $container, config $config, iohandler_interface $iohandler, filesystem $filesystem, factory $file_updater_factory)
+	{
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->filesystem		= $filesystem;
+
+		$this->cache = $container->get('cache.driver');
+
+		// Initialize compression file updater
+		$this->file_updater = $file_updater_factory->get('compression');
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		if (!$this->iohandler->get_input('submit_continue_file_update', false))
+		{
+			// Handle merge conflicts
+			$merge_conflicts = $this->installer_config->get('merge_conflict_list', array());
+
+			// Create archive for merge conflicts
+			if (!empty($merge_conflicts))
+			{
+				$compression_method = $this->installer_config->get('file_update_compression', '');
+				$conflict_archive = $this->file_updater->init($compression_method);
+				$this->installer_config->set('update_file_conflict_archive', $conflict_archive);
+
+				foreach ($merge_conflicts as $filename)
+				{
+					$this->file_updater->create_new_file(
+						$filename,
+						base64_decode($this->cache->get('_file_' . md5($filename))),
+						true
+					);
+				}
+
+				// Render download box
+				$this->iohandler->add_download_link(
+					'phpbb_installer_update_conflict_download',
+					'DOWNLOAD_CONFLICTS',
+					'DOWNLOAD_CONFLICTS_EXPLAIN'
+				);
+
+				$this->file_updater->close();
+			}
+
+			// Render update file statuses
+			$file_update_info = $this->installer_config->get('update_files', array());
+			$file_status = array(
+				'deleted'		=> (!isset($file_update_info['delete'])) ? array() : $file_update_info['delete'],
+				'new'			=> (!isset($file_update_info['new'])) ? array() : $file_update_info['new'],
+				'conflict'		=> $this->installer_config->get('merge_conflict_list', array()),
+				'modified'		=> (!isset($file_update_info['update_with_diff'])) ? array() : $file_update_info['update_with_diff'],
+				'not_modified'	=> (!isset($file_update_info['update_without_diff'])) ? array() : $file_update_info['update_without_diff'],
+			);
+
+			$this->iohandler->render_update_file_status($file_status);
+
+			// Add form to continue update
+			$this->iohandler->add_user_form_group('UPDATE_CONTINUE_FILE_UPDATE', array(
+				'submit_continue_file_update' => array(
+					'label' => 'UPDATE_CONTINUE_FILE_UPDATE',
+					'type' => 'submit',
+				),
+			));
+
+			// Show results to the user
+			throw new user_interaction_required_exception();
+		}
+		else
+		{
+			$conflict_archive_path = $this->installer_config->get('update_file_conflict_archive', null);
+
+			// Remove archive
+			if ($conflict_archive_path !== null && $this->filesystem->exists($conflict_archive_path))
+			{
+				$this->filesystem->remove($conflict_archive_path);
+			}
+
+			$this->installer_config->set('update_file_conflict_archive', null);
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module/update_filesystem/task/update_files.php

@@ -0,0 +1,294 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\module\update_filesystem\task;
+
+use phpbb\exception\runtime_exception;
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\container_factory;
+use phpbb\install\helper\file_updater\factory;
+use phpbb\install\helper\file_updater\file_updater_interface;
+use phpbb\install\helper\iohandler\iohandler_interface;
+use phpbb\install\helper\update_helper;
+use phpbb\install\task_base;
+
+/**
+ * File updater task
+ */
+class update_files extends task_base
+{
+	/**
+	 * @var \phpbb\cache\driver\driver_interface
+	 */
+	protected $cache;
+
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var factory
+	 */
+	protected $factory;
+
+	/**
+	 * @var file_updater_interface
+	 */
+	protected $file_updater;
+
+	/**
+	 * @var update_helper
+	 */
+	protected $update_helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param container_factory		$container
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 * @param factory				$file_updater_factory
+	 * @param update_helper			$update_helper
+	 * @param string				$phpbb_root_path
+	 */
+	public function __construct(container_factory $container, config $config, iohandler_interface $iohandler, factory $file_updater_factory, update_helper $update_helper, $phpbb_root_path)
+	{
+		$this->factory			= $file_updater_factory;
+		$this->installer_config	= $config;
+		$this->iohandler		= $iohandler;
+		$this->update_helper	= $update_helper;
+		$this->phpbb_root_path	= $phpbb_root_path;
+
+		$this->cache			= $container->get('cache.driver');
+		$this->file_updater		= null;
+
+		parent::__construct(false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function check_requirements()
+	{
+		return $this->installer_config->get('do_update_files', false);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		$new_path = $this->update_helper->get_path_to_new_update_files();
+
+		$file_update_info = $this->installer_config->get('update_files', array());
+
+		$update_type_progress = $this->installer_config->get('file_updater_type_progress', '');
+		$update_elem_progress = $this->installer_config->get('file_updater_elem_progress', '');
+		$type_progress_found = false;
+		$elem_progress_found = false;
+
+		// Progress bar
+		$task_count = 0;
+		foreach ($file_update_info as $sub_array)
+		{
+			$task_count += count($sub_array);
+		}
+
+		// Everything is up to date, so just continue
+		if ($task_count === 0)
+		{
+			return;
+		}
+
+		$progress_count = $this->installer_config->get('file_update_progress_count', 0);
+		$this->iohandler->set_task_count($task_count, true);
+		$this->iohandler->set_progress('UPDATE_UPDATING_FILES', 0);
+
+		$this->file_updater = $this->get_file_updater();
+
+		// File updater fallback logic
+		try
+		{
+			// Update files
+			foreach ($file_update_info as $type => $file_update_vector)
+			{
+				if (!$type_progress_found)
+				{
+					if ($type === $update_type_progress || empty($update_elem_progress))
+					{
+						$type_progress_found = true;
+					}
+					else
+					{
+						continue;
+					}
+				}
+
+				foreach ($file_update_vector as $path)
+				{
+					if (!$elem_progress_found)
+					{
+						if ($path === $update_elem_progress || empty($update_elem_progress))
+						{
+							$elem_progress_found = true;
+						}
+						else
+						{
+							continue;
+						}
+					}
+
+					switch ($type)
+					{
+						case 'delete':
+							$this->file_updater->delete_file($path);
+						break;
+						case 'new':
+							$this->file_updater->create_new_file($path, $new_path . $path);
+						break;
+						case 'update_without_diff':
+							$this->file_updater->update_file($path, $new_path . $path);
+						break;
+						case 'update_with_diff':
+							$this->file_updater->update_file(
+								$path,
+								base64_decode($this->cache->get('_file_' . md5($path))),
+								true
+							);
+						break;
+					}
+
+					// Save progress
+					$this->installer_config->set('file_updater_type_progress', $type);
+					$this->installer_config->set('file_updater_elem_progress', $path);
+					$progress_count++;
+					$this->iohandler->set_progress('UPDATE_UPDATING_FILES', $progress_count);
+
+					if ($this->installer_config->get_time_remaining() <= 0 || $this->installer_config->get_memory_remaining() <= 0)
+					{
+						// Request refresh
+						throw new resource_limit_reached_exception();
+					}
+				}
+			}
+
+			$this->iohandler->finish_progress('UPDATE_UPDATING_FILES');
+		}
+		catch (runtime_exception $e)
+		{
+			if ($e instanceof resource_limit_reached_exception)
+			{
+				throw new resource_limit_reached_exception();
+			}
+
+			$current_method = $this->installer_config->get('file_update_method', '');
+
+			// File updater failed, try to fallback to download file update mode
+			if ($current_method !== 'compression')
+			{
+				$this->iohandler->add_warning_message(array(
+					'UPDATE_FILE_UPDATER_HAS_FAILED',
+					$current_method,
+					'compression'
+				));
+				$this->installer_config->set('file_update_method', 'compression');
+
+				// We only want a simple refresh here
+				throw new resource_limit_reached_exception();
+			}
+			else
+			{
+				// Nowhere to fallback to :(
+				// Due to the way the installer handles fatal errors, we need to throw a low level exception
+				throw new runtime_exception('UPDATE_FILE_UPDATERS_HAVE_FAILED');
+			}
+		}
+
+		$file_updater_method = $this->installer_config->get('file_update_method', '');
+		if ($file_updater_method === 'compression' || $file_updater_method === 'ftp')
+		{
+			$this->file_updater->close();
+		}
+	}
+
+	/**
+	 * Get file updater
+	 *
+	 * @param null|string	$file_updater_method	Name of the file updater to use
+	 *
+	 * @return file_updater_interface	File updater
+	 */
+	protected function get_file_updater($file_updater_method = null)
+	{
+		$file_updater_method = ($file_updater_method === null) ? $this->installer_config->get('file_update_method', '') : $file_updater_method;
+
+		if ($file_updater_method === 'compression')
+		{
+			$compression_method = $this->installer_config->get('file_update_compression', '');
+
+			/** @var \phpbb\install\helper\file_updater\compression_file_updater $file_updater */
+			$file_updater = $this->factory->get('compression');
+			$archive_path = $file_updater->init($compression_method);
+			$this->installer_config->set('update_file_archive', $archive_path);
+		}
+		else if ($file_updater_method === 'ftp')
+		{
+			/** @var \phpbb\install\helper\file_updater\ftp_file_updater $file_updater */
+			$file_updater = $this->factory->get('ftp');
+			$file_updater->init(
+				$this->installer_config->get('ftp_method', ''),
+				$this->installer_config->get('ftp_host', ''),
+				$this->installer_config->get('ftp_user', ''),
+				$this->installer_config->get('ftp_pass', ''),
+				$this->installer_config->get('ftp_path', ''),
+				$this->installer_config->get('ftp_port', 0),
+				$this->installer_config->get('ftp_timeout', 10)
+			);
+		}
+		else
+		{
+			/** @var file_updater_interface $file_updater */
+			$file_updater = $this->factory->get('direct_file');
+		}
+
+		return $file_updater;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}

phpbb/install/module_base.php

@@ -0,0 +1,213 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+use phpbb\di\ordered_service_collection;
+use phpbb\install\exception\resource_limit_reached_exception;
+use phpbb\install\helper\config;
+use phpbb\install\helper\iohandler\iohandler_interface;
+
+/**
+ * Base class for installer module
+ */
+abstract class module_base implements module_interface
+{
+	/**
+	 * @var config
+	 */
+	protected $install_config;
+
+	/**
+	 * @var iohandler_interface
+	 */
+	protected $iohandler;
+
+	/**
+	 * @var bool
+	 */
+	protected $is_essential;
+
+	/**
+	 * Array of tasks for installer module
+	 *
+	 * @var ordered_service_collection
+	 */
+	protected $task_collection;
+
+	/**
+	 * @var array
+	 */
+	protected $task_step_count;
+
+	/**
+	 * @var bool
+	 */
+	protected $allow_progress_bar;
+
+	/**
+	 * Installer module constructor
+	 *
+	 * @param ordered_service_collection	$tasks				array of installer tasks for installer module
+	 * @param bool							$essential			flag indicating whether the module is essential or not
+	 * @param bool							$allow_progress_bar	flag indicating whether or not to send progress information from within the module
+	 */
+	public function __construct(ordered_service_collection $tasks, $essential = true, $allow_progress_bar = true)
+	{
+		$this->task_collection		= $tasks;
+		$this->is_essential			= $essential;
+		$this->allow_progress_bar	= $allow_progress_bar;
+	}
+
+	/**
+	 * Dependency getter
+	 *
+	 * @param config				$config
+	 * @param iohandler_interface	$iohandler
+	 */
+	public function setup(config $config, iohandler_interface $iohandler)
+	{
+		$this->install_config	= $config;
+		$this->iohandler		= $iohandler;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_essential()
+	{
+		return $this->is_essential;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * Overwrite this method if your task is non-essential!
+	 */
+	public function check_requirements()
+	{
+		return true;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function run()
+	{
+		// Recover install progress
+		$task_index	= $this->recover_progress();
+		$iterator	= $this->task_collection->getIterator();
+
+		if ($task_index < $iterator->count())
+		{
+			$iterator->seek($task_index);
+		}
+		else
+		{
+			$this->install_config->set_finished_task(0);
+			return;
+		}
+
+		while ($iterator->valid())
+		{
+			$task = $iterator->current();
+			$name = $iterator->key();
+
+			// Check if we can run the task
+			if (!$task->is_essential() && !$task->check_requirements())
+			{
+				$this->iohandler->add_log_message(array(
+					'SKIP_TASK',
+					$name,
+				));
+
+				$this->install_config->increment_current_task_progress($this->task_step_count[$name]);
+			}
+			else
+			{
+				// Send progress information
+				if ($this->allow_progress_bar)
+				{
+					$this->iohandler->set_progress(
+						$task->get_task_lang_name(),
+						$this->install_config->get_current_task_progress()
+					);
+
+					$this->iohandler->send_response();
+				}
+
+				$task->run();
+
+				if ($this->allow_progress_bar)
+				{
+					// Only increment progress by one, as if a task has more than one steps
+					// then that should be incremented in the task itself
+					$this->install_config->increment_current_task_progress();
+				}
+			}
+
+			$task_index++;
+			$this->install_config->set_finished_task($task_index);
+			$iterator->next();
+
+			// Send progress information
+			if ($this->allow_progress_bar)
+			{
+				$this->iohandler->set_progress(
+					$task->get_task_lang_name(),
+					$this->install_config->get_current_task_progress()
+				);
+			}
+
+			$this->iohandler->send_response();
+
+			// Stop execution if resource limit is reached
+			if ($iterator->valid() && ($this->install_config->get_time_remaining() <= 0 || $this->install_config->get_memory_remaining() <= 0))
+			{
+				throw new resource_limit_reached_exception();
+			}
+		}
+
+		// Module finished, so clear task progress
+		$this->install_config->set_finished_task(0);
+	}
+
+	/**
+	 * Returns the next task's name
+	 *
+	 * @return string	Index of the array element of the next task
+	 */
+	protected function recover_progress()
+	{
+		$progress_array = $this->install_config->get_progress_data();
+		return $progress_array['last_task_index'];
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_step_count()
+	{
+		$task_step_count = 0;
+		$task_class_names = $this->task_collection->get_service_classes();
+
+		foreach ($task_class_names as $name => $task_class)
+		{
+			$step_count = $task_class::get_step_count();
+			$task_step_count += $step_count;
+			$this->task_step_count[$name] = $step_count;
+		}
+
+		return $task_step_count;
+	}
+}

phpbb/install/module_interface.php

@@ -0,0 +1,63 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+/**
+ * Interface for installer modules
+ *
+ * An installer module is a task collection which executes installer tasks.
+ */
+interface module_interface
+{
+	/**
+	 * Checks if the execution of the module is essential to install phpBB or it can be skipped
+	 *
+	 * Note: Please note that all the non-essential modules have to implement check_requirements()
+	 * method.
+	 *
+	 * @return	bool	true if the module is essential, false otherwise
+	 */
+	public function is_essential();
+
+	/**
+	 * Checks requirements for the tasks
+	 *
+	 * Note: Only need to be implemented for non-essential tasks, as essential tasks
+	 * requirements should be checked in the requirements install module.
+	 *
+	 * @return bool	true if the task's requirements are met
+	 */
+	public function check_requirements();
+
+	/**
+	 * Executes the task
+	 *
+	 * @return	null
+	 */
+	public function run();
+
+	/**
+	 * Returns the number of tasks in the module
+	 *
+	 * @return int
+	 */
+	public function get_step_count();
+
+	/**
+	 * Returns an array to the correct navigation stage
+	 *
+	 * @return array
+	 */
+	public function get_navigation_stage_path();
+}

phpbb/install/task_base.php

@@ -0,0 +1,53 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+/**
+ * Base class for installer task
+ */
+abstract class task_base implements task_interface
+{
+	/**
+	 * @var bool
+	 */
+	protected $is_essential;
+
+	/**
+	 * Constructor
+	 *
+	 * @param bool $essential
+	 */
+	public function __construct($essential = true)
+	{
+		$this->is_essential = $essential;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_essential()
+	{
+		return $this->is_essential;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 *
+	 * Note: Overwrite this method if your task is non-essential!
+	 */
+	public function check_requirements()
+	{
+		return true;
+	}
+}

phpbb/install/task_interface.php

@@ -0,0 +1,61 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install;
+
+/**
+ * Interface for installer tasks
+ */
+interface task_interface
+{
+	/**
+	 * Returns the number of steps the task contains
+	 *
+	 * This is a helper method to provide a better progress bar for the front-end.
+	 *
+	 * @return int	The number of steps that the task contains
+	 */
+	static public function get_step_count();
+
+	/**
+	 * Checks if the task is essential to install phpBB or it can be skipped
+	 *
+	 * Note: Please note that all the non-essential modules have to implement check_requirements()
+	 * method.
+	 *
+	 * @return	bool	true if the task is essential, false otherwise
+	 */
+	public function is_essential();
+
+	/**
+	 * Checks requirements for the tasks
+	 *
+	 * Note: Only need to be implemented for non-essential tasks, as essential tasks
+	 * requirements should be checked in the requirements install module.
+	 *
+	 * @return bool	true if the task's requirements are met
+	 */
+	public function check_requirements();
+
+	/**
+	 * Executes the task
+	 */
+	public function run();
+
+	/**
+	 * Returns the language key of the name of the task
+	 *
+	 * @return string
+	 */
+	public function get_task_lang_name();
+}

phpbb/install/updater_configuration.php

@@ -0,0 +1,44 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class updater_configuration implements ConfigurationInterface
+{
+
+	/**
+	 * Generates the configuration tree builder.
+	 *
+	 * @return \Symfony\Component\Config\Definition\Builder\TreeBuilder The tree builder
+	 */
+	public function getConfigTreeBuilder()
+	{
+		$treeBuilder = new TreeBuilder();
+		$rootNode = $treeBuilder->root('updater');
+		$rootNode
+			->addDefaultsIfNotSet()
+			->children()
+				->enumNode('type')->values(['all','db_only'])->defaultValue('all')->end()
+				->arrayNode('extensions')
+					->prototype('scalar')->end()
+					->defaultValue([])
+				->end()
+			->end()
+		;
+
+		return $treeBuilder;
+	}
+}