DebugUniversalClassLoader.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\ClassLoader;


/**
 * Checks that the class is actually declared in the included file.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class DebugUniversalClassLoader extends UniversalClassLoader {

  /**
   * Replaces all regular UniversalClassLoader instances by a DebugUniversalClassLoader ones.
   */
  public static function enable() {
    if (!is_array($functions = spl_autoload_functions())) {
      return;
    }
    foreach ($functions as $function) {
      spl_autoload_unregister($function);
    }
    foreach ($functions as $function) {
      if (is_array($function) && $function[0] instanceof UniversalClassLoader) {
        $loader = new static();
        $loader
          ->registerNamespaceFallbacks($function[0]
          ->getNamespaceFallbacks());
        $loader
          ->registerPrefixFallbacks($function[0]
          ->getPrefixFallbacks());
        $loader
          ->registerNamespaces($function[0]
          ->getNamespaces());
        $loader
          ->registerPrefixes($function[0]
          ->getPrefixes());
        $loader
          ->useIncludePath($function[0]
          ->getUseIncludePath());
        $function[0] = $loader;
      }
      spl_autoload_register($function);
    }
  }

  /**
   * {@inheritDoc}
   */
  public function loadClass($class) {
    if ($file = $this
      ->findFile($class)) {
      require $file;
      if (!class_exists($class, false) && !interface_exists($class, false) && (!function_exists('trait_exists') || !trait_exists($class, false))) {
        throw new \RuntimeException(sprintf('The autoloader expected class "%s" to be defined in file "%s". The file was found but the class was not in it, the class name or namespace probably has a typo.', $class, $file));
      }
    }
  }

}