Many, many years ago, I wrote this for unclear reasons. I don't think I actually
used it for anything. It implements the PHP
functions in Ruby, allowing you to read/write PHP sessions and otherwise share
objects between the two.
Now the various forks of it have nearly half a million downloads between them. php-serialize is the "official" version, with nearly half of those.
The exact incept date is uncertain, the earliest mention of it a quick search finds is ruby-talk:73669, 2003-06-16.