数据库连接不成功SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known 
连接参数
link: mysql:host=rm-8vby4bsdoe4kbn301.mysql.zhangbei.rds.aliyuncs.com;port=3306;dbname=sinoweb2018user:sinoweb2018pass:Yee@sinoweb2018

DB::getone()

Array
(
    [0] => select * from @pf_config order by id asc
)

 5.  		$this->id = IGet("id");

 6.  		$this->cid = IGet("cid");

 7.  		$this->assign("config",DB::getone("select * from @pf_config order by id asc"));		// 获取网站配置

 8.          $this->assign('banner',DB::getone('select * from @pf_column_thumb where `keys`=?',array(Route::get('ctl'))));

 9.