CODEWITHSUNDEEP
phpregexsubdomain
hakki
hakki

Reputation: 6501

Regular Expression | Catch domain from url with subdomain

Im using a regex on PHP to convert an url to a domain like below

function getDomainFromUrl($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;
}

Now I want to get domain with its subdomain. What should I do on my regex?

Now:

http://subdomain.example.com -> returns to example.com

Expected:

subomain.example.com

Last but most important part for me: if url has www. subdomain should be removed. I don't want to get www.

Upvotes: 1

Views: 223

Answers (2)

DWand
DWand

Reputation: 672

How about this?

function getDomainFromUrl($url) {
    if (!filter_var($url, FILTER_VALIDATE_URL)) {
        $url = 'http://' . $url;
    }
    $host = parse_url($url, PHP_URL_HOST);
    return preg_replace('/^www\./', '', $host);
}

Upvotes: 1

Randomius
Randomius

Reputation: 350

print get_domain("http://subomain.example.com"); // outputs 'example.com'

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;
}

Upvotes: 1

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