EDIT: We allow our product download after submitting a simple form.
To avoid the owners of “illegal websites” learning where our product downloads are located, I was thinking about renaming the download folder after every download.
How can I do this in PHP?
Best solution so far is the following: http://www.devshed.com/c/a/PHP/Simple-and-Secure-PHP-Download-Script-with-Limits-Tutorial/.
Thanks to all of you for directing me to this approach.