I'm trying to make it so that users can choose an avatar out of a list of already pre-uploaded ones. I have no idea how to do this. Should I assign each pre-uploaded image an ID? A Code snippet to get me started would be great.

Quick search on google and images in a directory gives me:

http://www.the-art-of-web.com/php/dirlist/1/

Or you could do it where you store the name of the image in a table in a DB, then loop through all results from that table, displaying the file name of every image, showing the image.

Thanks