Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for db failed: Name does not resolve in /www/cms/clases/gt/bd.php on line 43

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for db failed: Name does not resolve in /www/cms/clases/gt/bd.php:43 Stack trace: #0 /www/cms/clases/gt/bd.php(43): mysqli->__construct() #1 /www/cms/clases/gt/bd.php(34): bd->conectar() #2 /www/cms/clases/gt/usuario.php(86): bd->__construct() #3 /www/index.php(16): usuario->__construct() #4 {main} thrown in /www/cms/clases/gt/bd.php on line 43