Pythoneer

Quite a while ago I had written a package for the PHP Extension and Application repository (PEAR) that tried to handle trees. It had started out as a simple package, which was handling trees by a “brain dead” method, but later I had added Nested Sets and other more clever ways. It is now already quite a while ago that I had given up maintenance but I am still getting requests about the package, not very often, but from time to time it happens.
I will list some links that hopefully help out.

A PEAR::Tree Tutorial by Demian Turner, a very good starting point!
The official PEAR online docs, if you don’t like looking into the source try this.
An article for the PHP Magazin where I described how to use Tree (german).

Btw. the os.visionp.de web page, that had some more extensive documentation on it had been taken offline.