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How do I pull the subdomain name out of a URL?

Posted on 2009-06-29
Medium Priority
Last Modified: 2012-05-07
How would I get the subdomain name from a web address?

For example, in http://subdomain.domain.com how would I grab the name subdomain from the URL?

Question by:Donnie Walker
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LVL 111

Expert Comment

by:Ray Paseur
ID: 24738062

$x = explode('.', $_SERVER["HTTP_HOST"]);
$subdomain = $x[0];

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LVL 111

Accepted Solution

Ray Paseur earned 2000 total points
ID: 24738074
If you have a separate URL in your code, first explode on the // to isolate the information that is in $_SERVER["HTTP_HOST"]
$url = 'http://subdomain.domain.com'
$x = explode('//', $url);
$host = $x[1];
$x = explode('.', $host);
$subdomain = $x[0];

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Author Closing Comment

by:Donnie Walker
ID: 31598019
As always Ray, Thanks.
LVL 111

Expert Comment

by:Ray Paseur
ID: 24739908
Thanks for the points - glad I could help, ~Ray

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