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(), '5.2.3' ) < 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
67 require ( dirname( __FILE__
) . '/includes/WebStart.php' );
71 function wfIndexMain() {
72 global $wgRequest, $wgShowHostnames, $mediaWiki, $wgTitle, $wgUseAjax, $wgUseFileCache;
74 wfProfileIn( 'index.php' );
75 wfProfileIn( 'index.php-setup' );
77 $maxLag = $wgRequest->getVal( 'maxlag' );
78 if ( !is_null( $maxLag ) ) {
79 $lb = wfGetLB(); // foo()->bar() is not supported in PHP4
80 list( $host, $lag ) = $lb->getMaxLag();
81 if ( $lag > $maxLag ) {
82 header( 'HTTP/1.1 503 Service Unavailable' );
83 header( 'Retry-After: ' . max( intval( $maxLag ), 5 ) );
84 header( 'X-Database-Lag: ' . intval( $lag ) );
85 header( 'Content-Type: text/plain' );
86 if( $wgShowHostnames ) {
87 echo "Waiting for $host: $lag seconds lagged\n";
89 echo "Waiting for a database server: $lag seconds lagged\n";
95 # Initialize MediaWiki base class
96 $context = RequestContext
::getMain();
97 $mediaWiki = new MediaWiki( $context );
99 # Set title from request parameters
100 $wgTitle = $mediaWiki->getTitle();
101 $action = $wgRequest->getVal( 'action', 'view' );
103 wfProfileOut( 'index.php-setup' );
105 # Send Ajax requests to the Ajax dispatcher.
106 if ( $wgUseAjax && $action == 'ajax' ) {
107 $dispatcher = new AjaxDispatcher();
108 $dispatcher->performAction();
109 wfProfileOut( 'index.php' );
110 $mediaWiki->restInPeace();
114 if ( $wgUseFileCache && $wgTitle !== null ) {
115 wfProfileIn( 'index.php-filecache' );
116 // Raw pages should handle cache control on their own,
117 // even when using file cache. This reduces hits from clients.
118 if ( $action != 'raw' && HTMLFileCache
::useFileCache() ) {
119 /* Try low-level file cache hit */
120 $cache = new HTMLFileCache( $wgTitle, $action );
121 if ( $cache->isFileCacheGood( /* Assume up to date */ ) ) {
122 /* Check incoming headers to see if client has this cached */
123 if ( !$context->output
->checkLastModified( $cache->fileCacheTime() ) ) {
124 $cache->loadFromFileCache();
126 # Do any stats increment/watchlist stuff
127 $article = Article
::newFromTitle( $wgTitle, $context );
128 $article->viewUpdates();
129 # Tell OutputPage that output is taken care of
130 $context->output
->disable();
131 wfProfileOut( 'index.php-filecache' );
132 $mediaWiki->finalCleanup();
133 wfProfileOut( 'index.php' );
134 $mediaWiki->restInPeace();
138 wfProfileOut( 'index.php-filecache' );
141 $mediaWiki->performRequestForTitle( $article );
144 * $wgArticle is deprecated, do not use it. This will possibly be removed
145 * entirely in 1.20 or 1.21
146 * @deprecated since 1.19
149 $wgArticle = $article;
151 $mediaWiki->finalCleanup();
153 wfProfileOut( 'index.php' );
155 $mediaWiki->restInPeace();
159 * Display something vaguely comprehensible in the event of a totally unrecoverable error.
160 * Does not assume access to *anything*; no globals, no autloader, no database, no localisation.
161 * Safe for PHP4 (and putting this here means that WebStart.php and GlobalSettings.php
162 * no longer need to be).
164 * Calling this function kills execution immediately.
166 * @param $errorMsg String fully-escaped HTML
168 function wfDie( $errorMsg ){
169 // Use the version set in DefaultSettings if possible, but don't rely on it
170 global $wgVersion, $wgLogo;
171 $version = isset( $wgVersion ) && $wgVersion
172 ?
htmlspecialchars( $wgVersion )
174 $logo = isset( $wgLogo ) && $wgLogo
176 : 'http://upload.wikimedia.org/wikipedia/commons/1/1c/MediaWiki_logo.png';
178 header( $_SERVER['SERVER_PROTOCOL'] . ' 500 MediaWiki configuration Error', true, 500 );
179 header( 'Content-type: text/html; charset=UTF-8' );
180 // Don't cache error pages! They cause no end of trouble...
181 header( 'Cache-control: none' );
182 header( 'Pragma: nocache' );
185 <!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
186 <html xmlns
='http://www.w3.org/1999/xhtml' lang
='en'>
188 <title
>MediaWiki
<?php
echo $version; ?
></title
>
189 <meta http
-equiv
='Content-Type' content
='text/html; charset=utf-8' />
190 <style type
='text/css' media
='screen'>
193 background
-color
: #fff;
194 font
-family
: sans
-serif
;
208 <img src
="<?php echo $logo; ?>" alt
='The MediaWiki logo' />
209 <h1
>MediaWiki
<?php
echo $version; ?
> internal error
</h1
>
210 <div
class='error'> <?php
echo $errorMsg; ?
> </div
>