SRV record lookup with PHP

Question

If you type

nslookup -type=SRV _xmpp-server._tcp.gmail.com

(or use the dig command in OSX) you get some SRV records relating to google chat

I would like to replicate this functionality in PHP, does anyone have any good ideas how to do this?

I would like to avoid using exec() as this does not return 100% standard responses across OSX/*NIX/WINDOWS

Thanks!

Answer 1

You could use Pear Net_DNS. I managed to get this to work on Linux, but haven't tested it on Windows or any others:

require_once('Net/DNS.php');
$resolver = new Net_DNS_Resolver();
$response = $resolver->query('_xmpp-server._tcp.gmail.com', 'SRV');
if ($response) {
  foreach ($response->answer as $rr) {
    $rr->display();
  }
}

I modified the example from their documentation. hope this helps

Answer 2

There is dns_get_record(). According to the docs it can take an int $type argument, which refers to a set of constants, one of them being DNS_SRV.

EDIT: According to the same docs:

Note: This function is not implemented on Windows platforms, nor does it (currently) work on *BSD systems (including Mac). Try the » PEAR class » Net_DNS.

Answer 3

Thankyou both, however the dns_get_record man page tells me the following

Note: This function is not implemented on Windows platforms, nor does it (currently) work on *BSD systems (including Mac). Try the » PEAR class » Net_DNS.

So tomhaigh, you win; but Tomalok you come in a close second :p