help wtih image manipulation (php?)
 

I want to have a site where users upload pictures, and I'd like to automatically add the site's logo on every picture that is uploaded.

I'm using php on a dedicated redhat server.

What's the easiest way to get it done? (A link will suffice)

Thanks

Handling file uploads : http://www.php.net/manual/en/features.file-upload.php

Make sure to apply several tests on the files uploaded though. You don't want to get bad stuff on your server.