Uploading files with PHP

[leebo]

First of all i must say what a great new Logo it is well smart

I have yet another problem using php, I have got a page to upload a picture but i need to find away to change the name of the file to the username.

i.e. a user find a picture they want lets say c:/windows/desktop/picture1.gif

The username will be sent via another page

www.example.com?username=leebo

I need to save the file as the username i.e. leebo.gif

Any ideas ?

Cheers