Get root URL and store it in a variable

[Bman900]

Is there a function that gets the root domain of a website? And then store it in  variable?

[jxrd]

$_SERVER['SERVER_NAME'];

[Bman900]

Is there a way to basically get the location of a file minus the file name?

 

Basically I want a code that will spit back the root of my files. For example if my files would be in

 

root the code above: $_SERVER['SERVER_NAME']; would work just fine for a link, but what if some one puts those files in a folder like root>backup the link would not work.

[jxrd]

dirname($_SERVER['REQUEST_URI']);