dns_get_record_from_server's Introduction

dns_get_record_from_server

PHP function. Get IPv4 and IPv6 addresses of a domain from a specific DNS server.

Because in PHP you can't select the DNS server with the function dns_get_record(), I have made this new function.

<?php
include "dns_get_record_from_server.php";

echo "ecirtam.net from 80.67.169.12 (FDN):\n";
print_r( dns_get_record_from_server('ecirtam.net', '80.67.169.12') );

echo "\n'debian.org' from 2001:910:800::12 (FDN):\n"; // If you have an IPv6 adress
print_r( dns_get_record_from_server('debian.org', '2001:910:800::12') );
?>

You should have :

ecirtam.net from 80.67.169.12 (FDN):
Array
(
    [4] => Array
        (
            [0] => 151.236.6.249
        )

    [6] => Array
        (
            [0] => 2a03:f80:ed15:ca7:ea75:b12d:6cc:4242
        )

)

'debian.org' from 2001:910:800::12 (FDN):
Array
(
    [4] => Array
        (
            [0] => 5.153.231.4
            [1] => 128.31.0.62
            [2] => 130.89.148.14
            [3] => 140.211.15.34
        )

    [6] => Array
        (
            [0] => 2001:610:1908:b000::148:14
            [1] => 2001:41c8:1000:21::21:4
        )

)

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dns_get_record_from_server's Issues

TXT records

I'm trying to stop shelling out to dig to get TXT records for LetsEncrypt DNS validation. I can't quite figure out how to do this reliably where the data returned is > 255 bytes. I know the leading byte is a length, but I can't seem to get it right. You wouldn't happen to know how to do this, would you?

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