Auto prune threads via cronjob
 

I would like to auto prune threads older then x time via a cronjob, but don't know how to do this.

In the past there were some mods for older VB versions but those are in the archive now. Can anybody make something like this as a plugin or product?

It would also be fine if somebody could tell me what the contents of a prune.php should be, then I could make the cronjob itself via the cronjob manager in VB 3.8.x.

Reason: I would like to have a sandbox forum in which users can play and test with forum options and things and learn how to post, reply, use bbcodes and tags and smilies etc. etc.