A shopping cart using php is a good place to learn how php works. I had promised to improve our simple shopping cart by adding some functionality to it. Today therefore, I have added a drop-down list to our web store so that customers can select an option describing where they found our store. It could be through television ads, phone directory, word of mouth or other sources. So, without much ado, am going to show you how our page will look like then share the php and html code.