Server File Deletion Programs

I have a program that creates a new file each time someone (or somebot) accesses the page and stores these files in a specific directory on my server. I would like to delete these files once a week so I would schedule it as a cron job, but I can't find a program that will actually delete files from the server in a directory I specify. I have found some programs but they all require that the files to be deleted use a specific name and the files I want to delete have long random names. Does anyone have a recommendation for a small program like this?