A way to extract www or test from the URL

[busboy]

I've created a subdomain that I can use for testing purposes. Is there a way to extract either www or test from the URL?

test.example.com

vs.

www.example.com

Links on the webpage will dynamically point to the right place if I can get this figured out.

Thanks!

[wonshikee]

I don't know if there's a php function to do this, but i just came up with this.

$str = 'test.domain.com';
$temp = explode('.', $str);
$subdomain = implode('.', array_splice($temp, 0, -2)); 
echo $subdomain; 

[Jake Arkinstall]

You could just use links relative to the http root. Might make things easier.

[dresden_phoenix]

The BEST solution would depend on what method you are using to get the URL in the first place.
but let say you have managed to get the URI into a sting before you finally echo it.
SINCE you know the length of your old domain=4, why not do this:

$URI="test.yourdomain.com";
$URI="www".sbstr($URI,4);// deletes the first four characters... eg.:'TEST' and adds 'www'


hope that helps