(PHP Extension) Cloudfare DNS over HTTPS

Cloudflare offers a DNS over HTTPS resolver at: https://cloudflare-dns.com/dns-query

This example demonstrates how to do a DNS lookup for a domain using Cloudfare's HTTPS resolver.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$http = new CkHttp();

// Send the following CURL request:   curl -H 'accept: application/dns-json' 'https://cloudflare-dns.com/dns-query?name=chilkat.io&type=A'

$http->put_Accept('application/dns-json');

$url = 'https://cloudflare-dns.com/dns-query?name=chilkat.io&type=A';

$jsonResp = $http->quickGetStr($url);
if ($http->get_LastMethodSuccess() != true) {
    print $http->lastErrorText() . "\n";
    exit;
}

print 'Response Status Code: ' . $http->get_LastStatus() . "\n";

$json = new CkJsonObject();
$json->Load($jsonResp);
$json->put_EmitCompact(false);
print $json->emit() . "\n";

if ($http->get_LastStatus() != 200) {
    print 'Failed.' . "\n";
    exit;
}

// Sample output...
// (See the parsing code below..)
// 

// {
//   "Status": 0,
//   "TC": false,
//   "RD": true,
//   "RA": true,
//   "AD": false,
//   "CD": false,
//   "Question": [
//     {
//       "name": "chilkat.io.",
//       "type": 1
//     }
//   ],
//   "Answer": [
//     {
//       "name": "chilkat.io.",
//       "type": 1,
//       "TTL": 900,
//       "data": "52.25.83.238"
//     }
//   ]
// }

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

$Status = $json->IntOf('Status');
$TC = $json->BoolOf('TC');
$RD = $json->BoolOf('RD');
$RA = $json->BoolOf('RA');
$AD = $json->BoolOf('AD');
$CD = $json->BoolOf('CD');
$i = 0;
$count_i = $json->SizeOfArray('Question');
while ($i < $count_i) {
    $json->put_I($i);
    $name = $json->stringOf('Question[i].name');
    $type = $json->IntOf('Question[i].type');
    $i = $i + 1;
}

$i = 0;
$count_i = $json->SizeOfArray('Answer');
// The domain name resolves to 1 or more IP addresses..
while ($i < $count_i) {
    $json->put_I($i);
    $name = $json->stringOf('Answer[i].name');
    $type = $json->IntOf('Answer[i].type');
    $TTL = $json->IntOf('Answer[i].TTL');
    $ipAddr = $json->stringOf('Answer[i].data');

    print 'IP Address: ' . $ipAddr . "\n";
    $i = $i + 1;
}


?>