static function setGlobal_array(array $config) {
        foreach ($config as $key => $value)
            self::setGlobal($key, $value);
    }
static function setGlobal_array(array $config) {
        foreach ($config as $key => $value)
            self::setGlobal($key, $value);
    }
批量设置全局配置项
@param array $config