(PHP ActiveX) DNS Query CAA Records

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

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

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Dns')
$dns = new COM("Chilkat.Dns");

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$json = new COM("Chilkat.JsonObject");
$json->EmitCompact = 0;

$success = $dns->Query('CAA','zoom.us',$json);
if ($success == 0) {
    print $dns->LastErrorText . "\n";
    exit;
}

print $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

$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;
}


?>