get domain and subdomain

hi experts

I would like to know what domain is my users using.
for exemple:

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It should do it.
cabouAuthor Commented:
this is not working.... it returns the full url instead of only
You tried $_SERVER['HTTP_HOST'] too?
I used it many times and never let me down.
But if you still get the long version, you should use an explode with "/" and save only the first element.
$uri = explode("/", $_SERVER['HTTP_HOST']);
echo $uri[0];

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