protected function matchGlobalVars(/*# string */ $name)/*# : string */
    {
        if (false !== strpos($name, '.')) {
            list($n, $k) = explode('.', $name, 2);
            if (isset($GLOBALS[$n]) && isset($GLOBALS[$n][$k])) {
                return $GLOBALS[$n][$k];
            }
        }
        return '';
    }