Developers just starting out with PHP have a pretty easy time getting the basics down, but there are a few things that can take a little time to get ones head around. I just looking around the PHP community, I've noticed a bit of a barrier when it comes to getting aquainted with sessions. So, to help overcome this bump in the road, here's a brief introduction to sessions - what they are and how they can help you.

Here is a list of a few very simple tips for optimizing your php/mysql applications. Keep these in mind while developing.