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<?php
/**
* This is the main web entry point for MediaWiki.
*
* If you are reading this in your web browser, your server is probably
* not configured correctly to run PHP applications!
*
* See the README, INSTALL, and UPGRADE files for basic setup instructions
* and pointers to the online documentation.
*
* http://www.mediawiki.org/
*
* ----------
*
* Copyright (C) 2001-2011 Magnus Manske, Brion Vibber, Lee Daniel Crocker,
* Tim Starling, Erik Möller, Gabriel Wicke, Ævar Arnfjörð Bjarmason,
* Niklas Laxström, Domas Mituzas, Rob Church, Yuri Astrakhan, Aryeh Gregor,
* Aaron Schulz, Andrew Garrett, Raimond Spekking, Alexandre Emsenhuber
* Siebrand Mazeland, Chad Horohoe, Roan Kattouw and others.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
// Bail on old versions of PHP. Pretty much every other file in the codebase
// has structures (try/catch, foo()->bar(), etc etc) which throw parse errors in PHP 4.
// Setup.php and ObjectCache.php have structures invalid in PHP 5.0 and 5.1, respectively.
if ( !function_exists( 'version_compare' ) || version_compare( phpversion(), '5.2.3' ) < 0 ) {
$phpversion = htmlspecialchars( phpversion() );
$errorMsg = <<<ENDL
<p>
MediaWiki requires PHP 5.2.3 or higher. You are running PHP $phpversion.
</p>
<p>
Please consider <a href="http://www.php.net/downloads.php">upgrading your copy of PHP</a>.
PHP versions less than 5.3.0 are no longer supported by the PHP Group and will not receive
security or bugfix updates.
</p>
<p>
If for some reason you are unable to upgrade your PHP version, you will need to
<a href="http://www.mediawiki.org/wiki/Download">download</a> an older version
of MediaWiki from our website. See our
<a href="http://www.mediawiki.org/wiki/Compatibility#PHP">compatibility page</a>
for details of which versions are compatible with prior versions of PHP.
</p>
ENDL;
wfDie( $errorMsg );
}
# Initialise common code. This gives us access to GlobalFunctions, the AutoLoader, and
# the globals $wgRequest, $wgOut, $wgUser, $wgLang and $wgContLang, amongst others; it
# does *not* load $wgTitle or $wgArticle
require ( dirname( __FILE__ ) . '/includes/WebStart.php' );
wfProfileIn( 'index.php' );
wfProfileIn( 'index.php-setup' );
$maxLag = $wgRequest->getVal( 'maxlag' );
if ( !is_null( $maxLag ) ) {
$lb = wfGetLB(); // foo()->bar() is not supported in PHP4
list( $host, $lag ) = $lb->getMaxLag();
if ( $lag > $maxLag ) {
header( 'HTTP/1.1 503 Service Unavailable' );
header( 'Retry-After: ' . max( intval( $maxLag ), 5 ) );
header( 'X-Database-Lag: ' . intval( $lag ) );
header( 'Content-Type: text/plain' );
if( $wgShowHostnames ) {
echo "Waiting for $host: $lag seconds lagged\n";
} else {
echo "Waiting for a database server: $lag seconds lagged\n";
}
exit;
}
}
# Initialize MediaWiki base class
$context = RequestContext::getMain();
$mediaWiki = new MediaWiki( $context );
# Set title from request parameters
$wgTitle = $mediaWiki->getTitle();
$action = $wgRequest->getVal( 'action', 'view' );
wfProfileOut( 'index.php-setup' );
# Send Ajax requests to the Ajax dispatcher.
if ( $wgUseAjax && $action == 'ajax' ) {
$dispatcher = new AjaxDispatcher();
$dispatcher->performAction();
wfProfileOut( 'index.php' );
$mediaWiki->restInPeace();
exit;
}
if ( $wgUseFileCache && $wgTitle !== null ) {
wfProfileIn( 'index.php-filecache' );
// Raw pages should handle cache control on their own,
// even when using file cache. This reduces hits from clients.
if ( $action != 'raw' && HTMLFileCache::useFileCache() ) {
/* Try low-level file cache hit */
$cache = new HTMLFileCache( $wgTitle, $action );
if ( $cache->isFileCacheGood( /* Assume up to date */ ) ) {
/* Check incoming headers to see if client has this cached */
if ( !$context->output->checkLastModified( $cache->fileCacheTime() ) ) {
$cache->loadFromFileCache();
}
# Do any stats increment/watchlist stuff
$wgArticle = MediaWiki::articleFromTitle( $wgTitle, $context );
$wgArticle->viewUpdates();
# Tell OutputPage that output is taken care of
$context->output->disable();
wfProfileOut( 'index.php-filecache' );
$mediaWiki->finalCleanup();
wfProfileOut( 'index.php' );
$mediaWiki->restInPeace();
exit;
}
}
wfProfileOut( 'index.php-filecache' );
}
# Setting global variables in mediaWiki
$mediaWiki->setVal( 'DisableHardRedirects', $wgDisableHardRedirects );
$mediaWiki->setVal( 'EnableCreativeCommonsRdf', $wgEnableCreativeCommonsRdf );
$mediaWiki->setVal( 'EnableDublinCoreRdf', $wgEnableDublinCoreRdf );
$mediaWiki->setVal( 'Server', $wgServer );
$mediaWiki->setVal( 'SquidMaxage', $wgSquidMaxage );
$mediaWiki->setVal( 'UseExternalEditor', $wgUseExternalEditor );
$mediaWiki->setVal( 'UsePathInfo', $wgUsePathInfo );
$mediaWiki->performRequestForTitle( $wgArticle );
$mediaWiki->finalCleanup();
wfProfileOut( 'index.php' );
$mediaWiki->restInPeace();
/**
* Display something vaguely comprehensible in the event of a totally unrecoverable error.
* Does not assume access to *anything*; no globals, no autloader, no database, no localisation.
* Safe for PHP4 (and putting this here means that WebStart.php and GlobalSettings.php
* no longer need to be).
*
* Calling this function kills execution immediately.
*
* @param $errorMsg String fully-escaped HTML
*/
function wfDie( $errorMsg ){
// Use the version set in DefaultSettings if possible, but don't rely on it
global $wgVersion, $wgLogo;
$version = isset( $wgVersion ) && $wgVersion
? htmlspecialchars( $wgVersion )
: '';
$logo = isset( $wgLogo ) && $wgLogo
? $wgLogo
: 'http://upload.wikimedia.org/wikipedia/commons/1/1c/MediaWiki_logo.png';
header( $_SERVER['SERVER_PROTOCOL'] . ' 500 MediaWiki configuration Error', true, 500 );
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns='http://www.w3.org/1999/xhtml' lang='en'>
<head>
<title>MediaWiki <?php echo $version; ?></title>
<meta http-equiv='Content-Type' content='text/html; charset=utf-8' />
<style type='text/css' media='screen'>
body {
color: #000;
background-color: #fff;
font-family: sans-serif;
padding: 2em;
text-align: center;
}
p, img, h1 {
text-align: left;
margin: 0.5em 0;
}
h1 {
font-size: 120%;
}
</style>
</head>
<body>
<img src="<?php echo $logo; ?>" alt='The MediaWiki logo' />
<h1>MediaWiki <?php echo $version; ?> internal error</h1>
<div class='error'> <?php echo $errorMsg; ?> </div>
</body>
</html>
<?php
die( 1 );
}
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