public static function getConf($var)
 {
     /*{{{*/
     if (empty(self::$conf_arr)) {
         $a = get_class_vars('BaseConfig');
         $b = get_class_vars('AppConfig');
         self::$conf_arr = array_merge($a, $b);
         return self::$conf_arr[$var];
     } else {
         return self::$conf_arr[$var];
     }
 }