Thank you very much for this tutorial. I have been working with perl & php separtely for a number of years and have a perl written web app. I decided that perl wasn't doing a good job with one function and I knew the php handled this function flawlessly so I decided to write it in PHP. Then I ran into the session problem. I have been racking my brain for a few days trying to figure out a simple way to do this without rewriting the Storable freeze/thaw function in PHP. Sometimes the simplest solutions are the hardest to think of. Thanks, you have provided a reasonable solution implementable in a short period of time and will work reliably. Also, this is the only post that I have found that even discusses this issue. 8 years later, this page is still relevant. Thanks, greanie