Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /admin/includes/functions.db.inc.php on line 7

Warning: mysqli_connect(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Name or service not known in /admin/includes/functions.db.inc.php on line 7
Unable to connect to the database server.