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

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?

Donnie WalkerAsked:
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Ray PaseurCommented:

// BREAK THE HOST NAME APART AT THE DOTS
$x = explode('.', $_SERVER["HTTP_HOST"]);
$subdomain = $x[0];

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Ray PaseurCommented:
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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Donnie WalkerAuthor Commented:
As always Ray, Thanks.
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Ray PaseurCommented:
Thanks for the points - glad I could help, ~Ray
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