files

Okay I am making a small script for a web design company. What it does so far is take info - name, email, username,, pasword - which as all inputted by the designer. Then it creates a directory clients/$username on the company's server for the temp home of the clients web site. The design then ftps all files into this directory. Other than index.html I have no idea what the other files will be. so here is the problem I need to find the last update of one of any file in clients/$username. With out specificly knowing any of the filenames. As i can see there is no way for my script to list the files in this directory and there is no function to test for modifications of all files in a fiven directory. in the end i want that when the client logs in the script can spit out "you website was last updated -----" Ideas?