Smarty::getGlobal PHP Method

    public function getGlobal($varname = null)
    {
        if (isset($varname)) {
            if (isset(self::$global_tpl_vars[$varname])) {
                return self::$global_tpl_vars[$varname]->value;
            } else {
                return '';
            }
        } else {
            $_result = array();
            foreach (self::$global_tpl_vars as $key => $var) {
                $_result[$key] = $var->value;
            }
            return $_result;
        }
    }