| 
<?php
 use React\Dns\Model\Message;
 use React\Dns\Query\Query;
 use React\Dns\Query\UdpTransportExecutor;
 use React\EventLoop\Factory;
 
 require __DIR__ . '/../vendor/autoload.php';
 
 $loop = Factory::create();
 $executor = new UdpTransportExecutor('8.8.8.8:53', $loop);
 
 $name = isset($argv[1]) ? $argv[1] : 'www.google.com';
 
 $ipv4Query = new Query($name, Message::TYPE_A, Message::CLASS_IN);
 $ipv6Query = new Query($name, Message::TYPE_AAAA, Message::CLASS_IN);
 
 $executor->query($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');
 
 $loop->run();
 
 |