3 * This is the main web entry point for MediaWiki.
5 * If you are reading this in your web browser, your server is probably
6 * not configured correctly to run PHP applications!
8 * See the README, INSTALL, and UPGRADE files for basic setup instructions
9 * and pointers to the online documentation.
11 * http://www.mediawiki.org/
15 * Copyright (C) 2001-2011 Magnus Manske, Brion Vibber, Lee Daniel Crocker,
16 * Tim Starling, Erik Möller, Gabriel Wicke, Ævar Arnfjörð Bjarmason,
17 * Niklas Laxström, Domas Mituzas, Rob Church, Yuri Astrakhan, Aryeh Gregor,
18 * Aaron Schulz, Andrew Garrett, Raimond Spekking, Alexandre Emsenhuber
19 * Siebrand Mazeland, Chad Horohoe, Roan Kattouw and others.
21 * This program is free software; you can redistribute it and/or modify
22 * it under the terms of the GNU General Public License as published by
23 * the Free Software Foundation; either version 2 of the License, or
24 * (at your option) any later version.
26 * This program is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 * GNU General Public License for more details.
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
34 * http://www.gnu.org/copyleft/gpl.html
39 // Bail on old versions of PHP. Pretty much every other file in the codebase
40 // has structures (try/catch, foo()->bar(), etc etc) which throw parse errors in PHP 4.
41 // Setup.php and ObjectCache.php have structures invalid in PHP 5.0 and 5.1, respectively.
42 if ( !function_exists( 'version_compare' ) ||
version_compare( phpversion(), '5.2.0' ) < 0 ) {
43 $phpversion = htmlspecialchars( phpversion() );
46 MediaWiki requires PHP 5.2.3 or higher. You are running PHP $phpversion.
49 Please consider <a href="http://www.php.net/downloads.php">upgrading your copy of PHP</a>.
50 PHP versions less than 5.3.0 are no longer supported by the PHP Group and will not receive
51 security or bugfix updates.
54 If for some reason you are unable to upgrade your PHP version, you will need to
55 <a href="http://www.mediawiki.org/wiki/Download">download</a> an older version
56 of MediaWiki from our website. See our
57 <a href="http://www.mediawiki.org/wiki/Compatibility#PHP">compatibility page</a>
58 for details of which versions are compatible with prior versions of PHP.
64 # Initialise common code. This gives us access to GlobalFunctions, the AutoLoader, and
65 # the globals $wgRequest, $wgOut, $wgUser, $wgLang and $wgContLang, amongst others; it
66 # does *not* load $wgTitle or $wgArticle
67 require ( dirname( __FILE__
) . '/includes/WebStart.php' );
69 wfProfileIn( 'index.php' );
70 wfProfileIn( 'index.php-setup' );
72 $maxLag = $wgRequest->getVal( 'maxlag' );
73 if ( !is_null( $maxLag ) ) {
74 $lb = wfGetLB(); // foo()->bar() is not supported in PHP4
75 list( $host, $lag ) = $lb->getMaxLag();
76 if ( $lag > $maxLag ) {
77 header( 'HTTP/1.1 503 Service Unavailable' );
78 header( 'Retry-After: ' . max( intval( $maxLag ), 5 ) );
79 header( 'X-Database-Lag: ' . intval( $lag ) );
80 header( 'Content-Type: text/plain' );
81 if( $wgShowHostnames ) {
82 echo "Waiting for $host: $lag seconds lagged\n";
84 echo "Waiting for a database server: $lag seconds lagged\n";
90 # Initialize MediaWiki base class
91 $context = RequestContext
::getMain();
92 $mediaWiki = new MediaWiki( $context );
94 # Set title from request parameters
95 $wgTitle = $mediaWiki->getTitle();
96 $action = $wgRequest->getVal( 'action', 'view' );
98 wfProfileOut( 'index.php-setup' );
100 # Send Ajax requests to the Ajax dispatcher.
101 if ( $wgUseAjax && $action == 'ajax' ) {
102 $dispatcher = new AjaxDispatcher();
103 $dispatcher->performAction();
104 wfProfileOut( 'index.php' );
105 $mediaWiki->restInPeace();
109 if ( $wgUseFileCache && $wgTitle !== null ) {
110 wfProfileIn( 'index.php-filecache' );
111 // Raw pages should handle cache control on their own,
112 // even when using file cache. This reduces hits from clients.
113 if ( $action != 'raw' && HTMLFileCache
::useFileCache() ) {
114 /* Try low-level file cache hit */
115 $cache = new HTMLFileCache( $wgTitle, $action );
116 if ( $cache->isFileCacheGood( /* Assume up to date */ ) ) {
117 /* Check incoming headers to see if client has this cached */
118 if ( !$context->output
->checkLastModified( $cache->fileCacheTime() ) ) {
119 $cache->loadFromFileCache();
121 # Do any stats increment/watchlist stuff
122 $wgArticle = MediaWiki
::articleFromTitle( $wgTitle, $context );
123 $wgArticle->viewUpdates();
124 # Tell OutputPage that output is taken care of
125 $context->output
->disable();
126 wfProfileOut( 'index.php-filecache' );
127 $mediaWiki->finalCleanup();
128 wfProfileOut( 'index.php' );
129 $mediaWiki->restInPeace();
133 wfProfileOut( 'index.php-filecache' );
136 # Setting global variables in mediaWiki
137 $mediaWiki->setVal( 'DisableHardRedirects', $wgDisableHardRedirects );
138 $mediaWiki->setVal( 'EnableCreativeCommonsRdf', $wgEnableCreativeCommonsRdf );
139 $mediaWiki->setVal( 'EnableDublinCoreRdf', $wgEnableDublinCoreRdf );
140 $mediaWiki->setVal( 'Server', $wgServer );
141 $mediaWiki->setVal( 'SquidMaxage', $wgSquidMaxage );
142 $mediaWiki->setVal( 'UseExternalEditor', $wgUseExternalEditor );
143 $mediaWiki->setVal( 'UsePathInfo', $wgUsePathInfo );
145 $mediaWiki->performRequestForTitle( $wgArticle );
146 $mediaWiki->finalCleanup();
148 wfProfileOut( 'index.php' );
150 $mediaWiki->restInPeace();
153 * Display something vaguely comprehensible in the event of a totally unrecoverable error.
154 * Does not assume access to *anything*; no globals, no autloader, no database, no localisation.
155 * Safe for PHP4 (and putting this here means that WebStart.php and GlobalSettings.php
156 * no longer need to be).
158 * Calling this function kills execution immediately.
160 * @param $errorMsg String fully-escaped HTML
162 function wfDie( $errorMsg ){
163 // Use the version set in DefaultSettings if possible, but don't rely on it
164 global $wgVersion, $wgLogo;
165 $version = isset( $wgVersion ) && $wgVersion
166 ?
htmlspecialchars( $wgVersion )
168 $logo = isset( $wgLogo ) && $wgLogo
170 : 'http://upload.wikimedia.org/wikipedia/commons/1/1c/MediaWiki_logo.png';
172 header( $_SERVER['SERVER_PROTOCOL'] . ' 500 MediaWiki configuration Error', true, 500 );
175 <!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
176 <html xmlns
='http://www.w3.org/1999/xhtml' lang
='en'>
178 <title
>MediaWiki
<?php
echo $version; ?
></title
>
179 <meta http
-equiv
='Content-Type' content
='text/html; charset=utf-8' />
180 <style type
='text/css' media
='screen'>
183 background
-color
: #fff;
184 font
-family
: sans
-serif
;
198 <img src
="<?php echo $logo; ?>" alt
='The MediaWiki logo' />
199 <h1
>MediaWiki
<?php
echo $version; ?
> internal error
</h1
>
200 <div
class='error'> <?php
echo $errorMsg; ?
> </div
>