6a0d8892bc
Follows-up I8b1bdb84a969. This is not generated by that script, the autoload.php file is, but that one has a similar comment in it already. Change-Id: Icb44f3dab356820f1e3aa5ba56949219af1b5719
114 lines
4.1 KiB
PHP
114 lines
4.1 KiB
PHP
<?php
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/**
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* This defines autoloading handler for whole MediaWiki framework
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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*/
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/**
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* Locations of core classes
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* Extension classes are specified with $wgAutoloadClasses
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* This array is a global instead of a static member of AutoLoader to work around a bug in APC
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*/
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require_once __DIR__ . '/../autoload.php';
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class AutoLoader {
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static protected $autoloadLocalClassesLower = null;
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/**
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* autoload - take a class name and attempt to load it
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*
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* @param string $className Name of class we're looking for.
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*/
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static function autoload( $className ) {
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global $wgAutoloadClasses, $wgAutoloadLocalClasses,
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$wgAutoloadAttemptLowercase;
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// Workaround for PHP bug <https://bugs.php.net/bug.php?id=49143> (5.3.2. is broken, it's
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// fixed in 5.3.6). Strip leading backslashes from class names. When namespaces are used,
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// leading backslashes are used to indicate the top-level namespace, e.g. \foo\Bar. When
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// used like this in the code, the leading backslash isn't passed to the auto-loader
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// ($className would be 'foo\Bar'). However, if a class is accessed using a string instead
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// of a class literal (e.g. $class = '\foo\Bar'; new $class()), then some versions of PHP
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// do not strip the leading backlash in this case, causing autoloading to fail.
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$className = ltrim( $className, '\\' );
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$filename = false;
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if ( isset( $wgAutoloadLocalClasses[$className] ) ) {
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$filename = $wgAutoloadLocalClasses[$className];
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} elseif ( isset( $wgAutoloadClasses[$className] ) ) {
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$filename = $wgAutoloadClasses[$className];
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} elseif ( $wgAutoloadAttemptLowercase ) {
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/*
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* Try a different capitalisation.
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*
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* PHP 4 objects are always serialized with the classname coerced to lowercase,
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* and we are plagued with several legacy uses created by MediaWiki < 1.5, see
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* https://wikitech.wikimedia.org/wiki/Text_storage_data
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*/
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$lowerClass = strtolower( $className );
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if ( self::$autoloadLocalClassesLower === null ) {
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self::$autoloadLocalClassesLower = array_change_key_case( $wgAutoloadLocalClasses, CASE_LOWER );
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}
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if ( isset( self::$autoloadLocalClassesLower[$lowerClass] ) ) {
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if ( function_exists( 'wfDebugLog' ) ) {
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wfDebugLog( 'autoloader', "Class {$className} was loaded using incorrect case" );
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}
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$filename = self::$autoloadLocalClassesLower[$lowerClass];
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}
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}
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if ( !$filename ) {
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// Class not found; let the next autoloader try to find it
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return;
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}
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// Make an absolute path, this improves performance by avoiding some stat calls
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if ( substr( $filename, 0, 1 ) != '/' && substr( $filename, 1, 1 ) != ':' ) {
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global $IP;
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$filename = "$IP/$filename";
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}
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require $filename;
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}
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/**
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* Force a class to be run through the autoloader, helpful for things like
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* Sanitizer that have define()s outside of their class definition. Of course
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* this wouldn't be necessary if everything in MediaWiki was class-based. Sigh.
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*
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* @param string $class
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* @return bool Return the results of class_exists() so we know if we were successful
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*/
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static function loadClass( $class ) {
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return class_exists( $class );
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}
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/**
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* Method to clear the protected class property $autoloadLocalClassesLower.
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* Used in tests.
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*/
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static function resetAutoloadLocalClassesLower() {
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self::$autoloadLocalClassesLower = null;
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}
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}
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spl_autoload_register( array( 'AutoLoader', 'autoload' ) );
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