Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo failed: No such host is known. in C:\inetpub\volleyproject\db.php on line 9

Warning: mysqli_connect(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: No such host is known. in C:\inetpub\volleyproject\db.php on line 9
Error: Unable to connect to MySQL. Debugging errno: 2002 Debugging error: php_network_getaddresses: getaddrinfo failed: No such host is known.