6 files changed, 89 insertions, 13 deletions
diff --git a/phpBB/config/services.yml b/phpBB/config/services.yml
index 01e470f87f..e6a76ce88e 100644
--- a/phpBB/config/services.yml
+++ b/phpBB/config/services.yml
@@ -90,7 +90,7 @@ services:
         arguments:
             - @template
             - @user
-            - @request
+            - @config
             - %core.root_path%
             - %core.php_ext%
 
diff --git a/phpBB/includes/acp/acp_board.php b/phpBB/includes/acp/acp_board.php
index 51a7628b68..449ce55e0f 100644
--- a/phpBB/includes/acp/acp_board.php
+++ b/phpBB/includes/acp/acp_board.php
@@ -375,6 +375,7 @@ class acp_board
 						'use_system_cron'		=> array('lang' => 'USE_SYSTEM_CRON',		'validate' => 'bool',	'type' => 'radio:yes_no', 'explain' => true),
 
 						'legend2'				=> 'PATH_SETTINGS',
+						'enable_mod_rewrite'	=> array('lang' => 'MOD_REWRITE_ENABLE',	'validate' => 'bool',	'type' => 'custom', 'method' => 'enable_mod_rewrite', 'explain' => true),
 						'smilies_path'			=> array('lang' => 'SMILIES_PATH',		'validate' => 'rpath',	'type' => 'text:20:255', 'explain' => true),
 						'icons_path'			=> array('lang' => 'ICONS_PATH',		'validate' => 'rpath',	'type' => 'text:20:255', 'explain' => true),
 						'upload_icons_path'		=> array('lang' => 'UPLOAD_ICONS_PATH',	'validate' => 'rpath',	'type' => 'text:20:255', 'explain' => true),
@@ -1001,4 +1002,51 @@ class acp_board
 		$cache->destroy('sql', FORUMS_TABLE);
 	}
 
+	/**
+	* Option to enable/disable removal of 'app.php' from URLs
+	*
+	* Note that if mod_rewrite is on, URLs without app.php will still work,
+	* but any paths generated by the controller helper url() method will not
+	* contain app.php.
+	*
+	* @param int $value The current config value
+	* @param string $key The config key
+	* @return string The HTML for the form field
+	*/
+	function enable_mod_rewrite($value, $key)
+	{
+		global $user, $config;
+
+		// Determine whether mod_rewrite is enabled on the server
+		// NOTE: This only works on Apache servers on which PHP is NOT
+		// installed as CGI. In that case, there is no way for PHP to
+		// determine whether or not the Apache module is enabled.
+		//
+		// To be clear on the value of $mod_rewite:
+		// null = Cannot determine whether or not the server has mod_rewrite
+		//        enabled
+		// false = Can determine that the server does NOT have mod_rewrite
+		//         enabled
+		// true = Can determine that the server DOES have mod_rewrite_enabled
+		$mod_rewrite = null;
+		if (function_exists('apache_get_modules'))
+		{
+			$mod_rewrite = (bool) in_array('mod_rewrite', apache_get_modules());
+		}
+
+		// If $message is false, mod_rewrite is enabled.
+		// Otherwise, it is not and we need to:
+		// 1) disable the form field
+		// 2) make sure the config value is set to 0
+		// 3) append the message to the return
+		$value = ($mod_rewrite === false) ? 0 : $value;
+		$message = $mod_rewrite === null ? 'MOD_REWRITE_INFORMATION_UNAVAILABLE' : ($mod_rewrite === false ? 'MOD_REWRITE_DISABLED' : false);
+
+		// Let's do some friendly HTML injection if we want to disable the
+		// form field because h_radio() has no pretty way of doing so
+		$field_name = 'config[enable_mod_rewrite]' . ($message === 'MOD_REWRITE_DISABLED' ? '" disabled="disabled' : '');
+
+		return h_radio($field_name, array(1 => 'YES', 0 => 'NO'), $value) .
+			($message !== false ? '<br /><span>' . $user->lang($message) . '</span>' : '');
+	}
 }
diff --git a/phpBB/install/schemas/schema_data.sql b/phpBB/install/schemas/schema_data.sql
index 0a31b89aab..68f3c32f72 100644
--- a/phpBB/install/schemas/schema_data.sql
+++ b/phpBB/install/schemas/schema_data.sql
@@ -101,6 +101,7 @@ INSERT INTO phpbb_config (config_name, config_value) VALUES ('email_function_nam
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('email_max_chunk_size', '50');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('email_package_size', '20');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('enable_confirm', '1');
+INSERT INTO phpbb_config (config_name, config_value) VALUES ('enable_mod_rewrite', '0');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('enable_pm_icons', '1');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('enable_post_confirm', '1');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('feed_enable', '1');
diff --git a/phpBB/language/en/acp/board.php b/phpBB/language/en/acp/board.php
index abc7738ee3..2ee96ab5da 100644
--- a/phpBB/language/en/acp/board.php
+++ b/phpBB/language/en/acp/board.php
@@ -433,6 +433,10 @@ $lang = array_merge($lang, array(
 	'FORCE_SERVER_VARS_EXPLAIN'	=> 'If set to yes the server settings defined here will be used in favour of the automatically determined values.',
 	'ICONS_PATH'				=> 'Post icons storage path',
 	'ICONS_PATH_EXPLAIN'		=> 'Path under your phpBB root directory, e.g. <samp>images/icons</samp>.',
+	'MOD_REWRITE_ENABLE'		=> 'Enable URL Rewriting',
+	'MOD_REWRITE_ENABLE_EXPLAIN' => 'When enabled, URLs containing ’app.php’ will be rewritten to remove the filename (i.e. app.php/foo will become /foo). <strong>Apache server’s mod_rewrite module is required for this functionality to work; if this option is enabled without mod_rewrite support, URLs on your board may be broken.</strong>',
+	'MOD_REWRITE_DISABLED'		=> 'The <strong>mod_rewrite</strong> module on your Apache web server is disabled. Enable the module or contact your web hosting provider if you wish to enable this feature.',
+	'MOD_REWRITE_INFORMATION_UNAVAILABLE' => 'We are unable to determine whether or not this server supports URL rewriting. This setting may be enabled but if URL rewriting is not available, paths generated by this board (such as for use in links) may be broken. Contact your web hosting provider if you are unsure whether or not you can safely enable this feature.',
 	'PATH_SETTINGS'				=> 'Path settings',
 	'RANKS_PATH'				=> 'Rank image storage path',
 	'RANKS_PATH_EXPLAIN'		=> 'Path under your phpBB root directory, e.g. <samp>images/ranks</samp>.',
diff --git a/phpBB/phpbb/controller/helper.php b/phpBB/phpbb/controller/helper.php
index 4d240f9380..3f6ef24ce0 100644
--- a/phpBB/phpbb/controller/helper.php
+++ b/phpBB/phpbb/controller/helper.php
@@ -36,10 +36,10 @@ class phpbb_controller_helper
 	protected $user;
 
 	/**
-	* Request object
-	* @var phpbb_request
+	* config object
+	* @var phpbb_config
 	*/
-	protected $request;
+	protected $config;
 
 	/**
 	* phpBB root path
@@ -61,11 +61,11 @@ class phpbb_controller_helper
 	* @param string $phpbb_root_path phpBB root path
 	* @param string $php_ext PHP extension
 	*/
-	public function __construct(phpbb_template $template, phpbb_user $user, phpbb_request_interface $request, $phpbb_root_path, $php_ext)
+	public function __construct(phpbb_template $template, phpbb_user $user, phpbb_config $config, $phpbb_root_path, $php_ext)
 	{
 		$this->template = $template;
 		$this->user = $user;
-		$this->request = $request;
+		$this->config = $config;
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
 	}
@@ -109,14 +109,12 @@ class phpbb_controller_helper
 			$route = substr($route, 0, $route_delim);
 		}
 
-		$request_uri = $this->request->variable('REQUEST_URI', '', false, phpbb_request::SERVER);
-		$script_name = $this->request->variable('SCRIPT_NAME', '', false, phpbb_request::SERVER);
-
-		// If the app.php file is being used (no rewrite) keep it in the URL.
-		// Otherwise, don't include it.
+		// If enable_mod_rewrite is false, we not need to include app.php
 		$route_prefix = $this->phpbb_root_path;
-		$parts = explode('/', $script_name);
-		$route_prefix .= strpos($request_uri, $script_name) === 0 ? array_pop($parts) . '/' : '';
+		if (empty($this->config['enable_mod_rewrite']))
+		{
+			$route_prefix .= 'app.' . $this->php_ext . '/';
+		}
 
 		return append_sid($route_prefix . "$route" . $route_params, $params, $is_amp, $session_id);
 	}
diff --git a/phpBB/phpbb/db/migration/data/310/mod_rewrite.php b/phpBB/phpbb/db/migration/data/310/mod_rewrite.php
new file mode 100644
index 0000000000..85ce25abf3
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/310/mod_rewrite.php
@@ -0,0 +1,25 @@
+<?php
+/**
+*
+* @package migration
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License v2
+*
+*/
+
+class phpbb_db_migration_data_310_mod_rewrite extends phpbb_db_migration
+{
+	static public function depends_on()
+	{
+		return array(
+			'phpbb_db_migration_data_310_dev',
+		);
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('config.add', array('enable_mod_rewrite', '0')),
+		);
+	}
+}