init

vendor/react/dns/examples/13-reverse-dns.php

@@ -0,0 +1,35 @@
+<?php
+
+use React\Dns\Config\Config;
+use React\Dns\Resolver\Factory;
+use React\Dns\Model\Message;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$loop = React\EventLoop\Factory::create();
+
+$config = Config::loadSystemConfigBlocking();
+$server = $config->nameservers ? reset($config->nameservers) : '8.8.8.8';
+
+$factory = new Factory();
+$resolver = $factory->create($server, $loop);
+
+$ip = isset($argv[1]) ? $argv[1] : '8.8.8.8';
+
+if (@inet_pton($ip) === false) {
+    exit('Error: Given argument is not a valid IP' . PHP_EOL);
+}
+
+if (strpos($ip, ':') === false) {
+    $name = inet_ntop(strrev(inet_pton($ip))) . '.in-addr.arpa';
+} else {
+    $name = wordwrap(strrev(bin2hex(inet_pton($ip))), 1, '.', true) . '.ip6.arpa';
+}
+
+$resolver->resolveAll($name, Message::TYPE_PTR)->then(function (array $names) {
+    var_dump($names);
+}, function (Exception $e) {
+    echo $e->getMessage() . PHP_EOL;
+});
+
+$loop->run();