Autoloader.php

<?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.
 *
 * @package twig
 * @author  Fabien Potencier <fabien@symfony.com>
 */
class Twig_Autoloader {

  /**
   * Registers Twig_Autoloader as an SPL autoloader.
   */
  public static function register() {
    ini_set('unserialize_callback_func', 'spl_autoload_call');
    spl_autoload_register(array(
      new self(),
      'autoload',
    ));
  }

  /**
   * Handles autoloading of classes.
   *
   * @param string $class A class name.
   */
  public static function autoload($class) {
    if (0 !== strpos($class, 'Twig')) {
      return;
    }
    if (is_file($file = dirname(__FILE__) . '/../' . str_replace(array(
      '_',
      "\0",
    ), array(
      '/',
      '',
    ), $class) . '.php')) {
      require $file;
    }
  }

}