Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /www/wwwroot/www.nt513.com/config.php on line 9

Warning: mysqli_connect(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Name or service not known in /www/wwwroot/www.nt513.com/config.php on line 9
Can't connect to MySQL Server. Errorcode: php_network_getaddresses: getaddrinfo failed: Name or service not known