alias and url with other languages

/**
 * @name FURL with UTF8
 * @desc Handle the task of FURL with UTF8 characters
 * @license Public domain
 */

/*
 * Initialize parameters
 */
if (!isset ($alias)) { return ; }
/*
 * Handle events
 */
$e =& $modx->event;
switch ($e->name ) {
    case 'OnStripAlias':

            $alias = strip_tags($alias); // strip HTML
            $alias = preg_replace('/\s+/', '-', $alias); // convert white-space to dash
            $alias = preg_replace('/-+/', '-', $alias);  // convert multiple dashes to one
            $alias = trim($alias, '-'); // trim excess
            $alias = rawurlencode($alias); //utf8_encode


            $e->output($alias);
            $e->stopPropagation();
        break ;
    default:
        return ;
}