Here is a screenshot of a simple PHP script I made to process orders of tires, bottles of oil, and spark plugs, calculating the total (and a discount if you ordered a lot of tires) and then saving the order to disk.
Here is the screenshot of the PHP script that displays the order amount, total cost, address, and how the person was referred to Bob's Auto Parts store. It also provides a link (and a warning of what it will do) to clear the database of orders. That last one was my idea
Here is the screenshot of the PHP script used to clear the database.