Warning: mysqli_connect(): (HY000/2002): Connection refused in /www/wwwroot/dubit30w.xyz/bmdb.php on line 38
数据库连接失败

Warning: mysqli_errno() expects parameter 1 to be mysqli, bool given in /www/wwwroot/dubit30w.xyz/bmdb.php on line 41
错误编码

Warning: mysqli_error() expects parameter 1 to be mysqli, bool given in /www/wwwroot/dubit30w.xyz/bmdb.php on line 42
错误信息