ERROR: SQLSTATE[HY000] [2002] Connection refused in framework/base/router.class.php已解决悬赏5积分

15:27:18 ERROR: SQLSTATE[HY000] [2002] Connection refused in framework/base/router.class.php on line 2164, last called by framework/base/router.class.php on line 2115 through function connectByPDO.
in framework/base/router.class.php on line 2215 when visiting