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vendor/symfony/http-kernel/Exception/UnauthorizedHttpException.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\Exception;
+
+/**
+ * @author Ben Ramsey <ben@benramsey.com>
+ */
+class UnauthorizedHttpException extends HttpException
+{
+    /**
+     * @param string     $challenge WWW-Authenticate challenge string
+     * @param string     $message   The internal exception message
+     * @param \Exception $previous  The previous exception
+     * @param int        $code      The internal exception code
+     */
+    public function __construct($challenge, $message = null, \Exception $previous = null, $code = 0)
+    {
+        $headers = array('WWW-Authenticate' => $challenge);
+
+        parent::__construct(401, $message, $previous, $headers, $code);
+    }
+}