Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for aaaaa failed: Name or service not known in /var/www/html/db.php on line 2

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for aaaaa failed: Name or service not known in /var/www/html/db.php:2 Stack trace: #0 /var/www/html/db.php(2): mysqli->__construct('aaaaa', 'root', Object(SensitiveParameterValue)) #1 {main} thrown in /var/www/html/db.php on line 2