Script Request: Clean folders with only a single file

[myarmor]

@tbone

But still, PHP as an add-on to the windows-scripting-host has not been used yet with DO, if I'm correct. So I'm not sure if this works as expected.

I've used PHP with DO9(?), although it is years ago.
At least back then it was very hard to use because if the script had any errors at all it crashed DO.