PHP get domain with subdomain from string

Question

Im using the following function to cut domain from string:

function get_domain($url)
{
  $pieces = parse_url($url);
  $domain = isset($pieces['host']) ? $pieces['host'] : '';
  if (preg_match('/(?P<domain>[a-z0-9][a-z0-9\-]{1,63}\.[a-z\.]{2,6})$/i', $domain, $regs)) {
    return $regs['domain'];
  }
  return false;
}

I need to cut subdomain + domain how should i change preg_match to get it?

PS i was searching solution but everyone wants to cut only domain without sub.

Then you're free to answer your question and even mark the answer as accepted. It's absolutely legit on SO. — Havelock
– Havelock, Commented May 21, 2014 at 6:19
Its fun, but sollution which i have found is not correct, becase its dont cut www. then the problem is still actual. — user3623906
– user3623906, Commented May 21, 2014 at 9:30
I don't get exactly what you want, for me parse_url provides the domain name. Please, give some sample input strings and desired result. — Toto
– Toto, Commented May 21, 2014 at 13:00

scipilot · Accepted Answer · 2014-05-21 13:11:38Z

1

If you can't work out the regexp, a more procedural approach might be:

$pieces = parse_url($url);
$aDomains = explode('.', $pieces['host']);
$sub = array_shift($aDomains);
$restofdomain = implode($aDomains);

...if you're always going to just want the first domain (i.e. it wouldn't work with a root domain like 'somedomain.com'.

answered May 21, 2014 at 13:11

scipilot

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1 Comment

Shiv Singh Over a year ago

what will be if domain name is somedomain.co.im

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