+ if (file_exists(INSTALLDIR.'/classes/' . $cls . '.php')) {
+ require_once(INSTALLDIR.'/classes/' . $cls . '.php');
+ } else if (file_exists(INSTALLDIR.'/lib/' . strtolower($cls) . '.php')) {
+ require_once(INSTALLDIR.'/lib/' . strtolower($cls) . '.php');
+ } else if (mb_substr($cls, -6) == 'Action' &&
+ file_exists(INSTALLDIR.'/actions/' . strtolower(mb_substr($cls, 0, -6)) . '.php')) {
+ require_once(INSTALLDIR.'/actions/' . strtolower(mb_substr($cls, 0, -6)) . '.php');
+ } else if ($cls == 'OAuthRequest') {