This chapter continued the look at interesting and usable web application samples. We showed how a blogging system works, how it is put together, and how to run it on our systems. You are encouraged to download, install, and run this sample to play with it and see how things work. Spending some time making some improvements to the application is an excellent way to develop further expertise with PHP.
The following chapter demonstrates our final major sample web application. It's an online store for posters, which deals with product listings, shopping carts, and checking out customers.