PHP

DNS Query CAA Records

See more DNS Examples

Shows how to perform a DNS query to retrieve CAA records.

Note: This example requires Chilkat v9.5.0.96 or later.

Chilkat2 PHP

<?php

use Chilkat2\Dns;
use Chilkat2\JsonObject;

$success = false;

$dns = new Dns();

$json = new JsonObject();
$json->EmitCompact = false;

$success = $dns->Query('CAA', 'zoom.us', $json);
if (!$success) {
    echo $dns->LastErrorText, "\n";
    exit;
}

echo $json->Emit(), "\n";

// Sample response.
// Parsing code below..

// {
//   "answer": {
//     "caa": [
//       {
//         "name": "zoom.us",
//         "ttl": 300,
//         "flags": 0,
//         "tag": "iodef",
//         "value": "mailto:security@zoom.us"
//       },
//       {
//         "name": "zoom.us",
//         "ttl": 300,
//         "flags": 0,
//         "tag": "issue",
//         "value": "amazon.com"
//       },
//       {
//         "name": "zoom.us",
//         "ttl": 300,
//         "flags": 0,
//         "tag": "issue",
//         "value": "digicert.com"
//       },
//       {
//         "name": "zoom.us",
//         "ttl": 300,
//         "flags": 0,
//         "tag": "issue",
//         "value": "godaddy.com"
//       },
//       {
//         "name": "zoom.us",
//         "ttl": 300,
//         "flags": 0,
//         "tag": "issue",
//         "value": "letsencrypt.org"
//       },
//       {
//         "name": "zoom.us",
//         "ttl": 300,
//         "flags": 0,
//         "tag": "issue",
//         "value": "pki.goog"
//       },
//       {
//         "name": "zoom.us",
//         "ttl": 300,
//         "flags": 0,
//         "tag": "issue",
//         "value": "sectigo.com"
//       }
//     ]
//   }
// }

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

$name = '';
$ttl = 0;
$flags = 0;
$tag = '';
$value = '';

$i = 0;
$count_i = $json->SizeOfArray('answer.caa');
while ($i < $count_i) {
    $json->I = $i;
    $name = $json->StringOf('answer.caa[i].name');
    $ttl = $json->IntOf('answer.caa[i].ttl');
    $flags = $json->IntOf('answer.caa[i].flags');
    $tag = $json->StringOf('answer.caa[i].tag');
    $value = $json->StringOf('answer.caa[i].value');
    $i = $i + 1;
}