I am making a very simple shopping cart that is not meant to have a payment gateway. I just need to make it easy for the person to add products and categories which is no problem. The problem is I have only made PHP apps with a login and I don't know how to manage an add to cart type thing without user identifying information. How do I ID a user and let them add stuff to a cart and the check out. Do I store it in a DB but them how does the info get deleted eventually? Thanks for the help.