parse url based on forward slashes

I need to parse a url using substr() or something similar based on its forward slashes.

In the end it will go from:
http://domain.com/mypage/one/

to dropping:
http://domain.com/

and leave only
mypage/one

notice The lack of the closing forward slash at the end of the original url. I appreciate any help in the matter

$uri = trim( $_SERVER['REQUEST_URI'], '/' );

absolutely fantastic! I thought trim() was only good for getting rid of blank spaces around the string.

Thanks a lot!