28 Building a Shopping Cart
IN THIS CHAPTER, YOU LEARN HOW TO BUILD a basic shopping cart. You add this on top of the Book-O-Rama database implemented in Part II, “Using MySQL.” You also explore another option: setting up and using an existing open source PHP shopping cart.
In case you have not heard it before, the term shopping cart (sometimes also called a shopping basket) is used to describe a specific online shopping mechanism. As you browse an online catalog, you can add items to your shopping cart. After you’ve finished browsing, you check out of the online store—that is, purchase the items in your cart.
To implement the shopping cart for this project, you need to implement the following functionality:
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