Symfony\Component\HttpFoundation\Request::setFactory PHP Method

    public static function setFactory($callable)
    {
        self::$requestFactory = $callable;
    }

 /**
  * @param string $type
  */
 private static function configureFactory($type)
 {
     if (version_compare(Kernel::VERSION, '2.5', '<')) {
         // nothing to configure as Request::setFactory require SF > 2.5
         return;
     }
     if (!in_array($type, array('host_with_path', 'host_with_path_by_locale'))) {
         return;
     }
     Request::setFactory(function (array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null) {
         return new SiteRequest($query, $request, $attributes, $cookies, $files, $server, $content);
     });
 }