The old version, programmed in January 2010, removed all found files and folders - without asking for permission. Positive: It was fast. Negative: It deleted everything, and by accident important files could be deleted as well.
Therefore I reprogrammed the php script and now it is the user who selects from a list, which files and folders (owned by the Apache user) should be deleted.
You can find the script in the HowTo section under PHP Script: Delete files and folders created by Apache user.