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<?php
/*
* This file is part of Twig.
*
* (c) 2009 Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Autoloads Twig classes.
*
* This is a modified version of Twig_Autoloader that survives without producing a fatal error even if someone else
* includes Twig_Autoloader recklessly, without checking if !class_exists(). When the register() method is being
* called, it checks all registered autoloaders. If the native Twig_Autoloader is already there, this class resigns
* and doesn't complete it's own registration.
*
* This will, however, work only if it happens late enough. In Types we assume that it is ok to do this during 'init'.
* The one known issue is with older WPML versions that register Twig right when the plugin is loaded.
*
* Note: Twig_Autoloader is marked as deprecated, however we can't easily use the proposed composer autoloader, since
* that breaks the PHP 5.2 compatibility.
*
* The original author of this class:
* @author Fabien Potencier <fabien@symfony.com>
*
* @since 2.0
*/
class Types_Twig_Autoloader
{
/**
* Registers Types_Twig_Autoloader as an SPL autoloader if Twig_Autoloader isn't already registered.
*
* @param bool $prepend Whether to prepend the autoloader or not.
*/
public static function register($prepend = false)
{
$autoloaders = spl_autoload_functions();
foreach( $autoloaders as $autoloader ) {
// Resign if we detect Twig_Autoloader
if( is_array( $autoloader )
&& 2 == count( $autoloader )
&& is_string( $autoloader[0] )
&& 'Twig_Autoloader' == $autoloader[0]
&& is_string( $autoloader[1] )
&& 'autoload' == $autoloader[1]
) {
return;
}
}
if (PHP_VERSION_ID < 50300) {
spl_autoload_register(array(__CLASS__, 'autoload'));
} else {
spl_autoload_register(array(__CLASS__, 'autoload'), true, $prepend);
}
}
/**
* Handles autoloading of classes.
*
* @param string $class A class name.
*/
public static function autoload($class)
{
if (0 !== strpos($class, 'Twig')) {
return;
}
// Modified path to Twig in Types.
$file = TYPES_ABSPATH . '/library/twig/twig/lib/' . str_replace( array( '_', "\0" ), array( '/', '' ), $class .'.php' );
if( is_file( $file ) ) {
/** @noinspection PhpIncludeInspection */
require $file;
}
}
}