I have a RoR app but for one of the funcationality (photo uploads) I
am using PHP. I need to know how I can share/access session
information from RoR in PHP since the PHP also updates the database
and the entry information is contained in the RoR sessions.
What session store are you using? In all cases i think you'll need to be able to unmarshal ruby objects from php. There are specs out there for the Marshal format.