query($ipv4Query)->then(function (Message $message) { foreach ($message->answers as $answer) { echo 'IPv4: ' . $answer->data . PHP_EOL; } }, 'printf'); $executor->query($ipv6Query)->then(function (Message $message) { foreach ($message->answers as $answer) { echo 'IPv6: ' . $answer->data . PHP_EOL; } }, 'printf');