Warning: mysqli_connect(): (HY000/2003): Maybe all db servers is down, check them first in /www/wwwroot/yonghaoka.cn/library/mySql.php on line 99

Warning: mysqli_select_db() expects parameter 1 to be mysqli, bool given in /www/wwwroot/yonghaoka.cn/library/mySql.php on line 103
cannot select DB
Fatal error: Uncaught Error: Call to a member function close() on bool in /www/wwwroot/yonghaoka.cn/library/mySql.php:111 Stack trace: #0 [internal function]: Mysql->__destruct() #1 {main} thrown in /www/wwwroot/yonghaoka.cn/library/mySql.php on line 111