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<?php
/**
* This defines autoloading handler for whole MediaWiki framework
*
* 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
*/
/**
* Locations of core classes
* Extension classes are specified with $wgAutoloadClasses
* This array is a global instead of a static member of AutoLoader to work around a bug in APC
*/
require_once __DIR__ . '/../autoload.php';
class AutoLoader {
static protected $autoloadLocalClassesLower = null;
/**
* autoload - take a class name and attempt to load it
*
* @param string $className Name of class we're looking for.
*/
static function autoload( $className ) {
global $wgAutoloadClasses, $wgAutoloadLocalClasses,
$wgAutoloadAttemptLowercase;
// Workaround for PHP bug <https://bugs.php.net/bug.php?id=49143> (5.3.2. is broken, it's
// fixed in 5.3.6). Strip leading backslashes from class names. When namespaces are used,
// leading backslashes are used to indicate the top-level namespace, e.g. \foo\Bar. When
// used like this in the code, the leading backslash isn't passed to the auto-loader
// ($className would be 'foo\Bar'). However, if a class is accessed using a string instead
// of a class literal (e.g. $class = '\foo\Bar'; new $class()), then some versions of PHP
// do not strip the leading backlash in this case, causing autoloading to fail.
$className = ltrim( $className, '\\' );
$filename = false;
if ( isset( $wgAutoloadLocalClasses[$className] ) ) {
$filename = $wgAutoloadLocalClasses[$className];
} elseif ( isset( $wgAutoloadClasses[$className] ) ) {
$filename = $wgAutoloadClasses[$className];
} elseif ( $wgAutoloadAttemptLowercase ) {
/*
* Try a different capitalisation.
*
* PHP 4 objects are always serialized with the classname coerced to lowercase,
* and we are plagued with several legacy uses created by MediaWiki < 1.5, see
* https://wikitech.wikimedia.org/wiki/Text_storage_data
*/
$lowerClass = strtolower( $className );
if ( self::$autoloadLocalClassesLower === null ) {
self::$autoloadLocalClassesLower = array_change_key_case( $wgAutoloadLocalClasses, CASE_LOWER );
}
if ( isset( self::$autoloadLocalClassesLower[$lowerClass] ) ) {
if ( function_exists( 'wfDebugLog' ) ) {
wfDebugLog( 'autoloader', "Class {$className} was loaded using incorrect case" );
}
$filename = self::$autoloadLocalClassesLower[$lowerClass];
}
}
if ( !$filename ) {
// Class not found; let the next autoloader try to find it
return;
}
// Make an absolute path, this improves performance by avoiding some stat calls
if ( substr( $filename, 0, 1 ) != '/' && substr( $filename, 1, 1 ) != ':' ) {
global $IP;
$filename = "$IP/$filename";
}
require $filename;
}
/**
* Force a class to be run through the autoloader, helpful for things like
* Sanitizer that have define()s outside of their class definition. Of course
* this wouldn't be necessary if everything in MediaWiki was class-based. Sigh.
*
* @param string $class
* @return bool Return the results of class_exists() so we know if we were successful
*/
static function loadClass( $class ) {
return class_exists( $class );
}
/**
* Method to clear the protected class property $autoloadLocalClassesLower.
* Used in tests.
*/
static function resetAutoloadLocalClassesLower() {
self::$autoloadLocalClassesLower = null;
}
}
spl_autoload_register( array( 'AutoLoader', 'autoload' ) );
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