How to check if page url has www in it or not with PHP?

Question

In PHP, how can I check if the current page has www in the url or not?

E.g if the user is on http://www.example.com/something , how can I find that there\'s www in t

Answer 1

From the manual

$_SERVER['HTTP_HOST']

Contents of the Host: header from the current request, if there is one.

$_SERVER['SERVER_NAME']

The name of the server host under which the current script is executing. If the script is running on a virtual host, this will be the value defined for that virtual host.