Project: Building a Shopping Cart
Just as the last two chapters presented groups of scripts that worked together toward a common goal, the scripts in this chapter work together to allow a user to browse the contents of a catalog of goods for sale, select some of those items, and purchase them.
With a little bit of design work, these scripts offer a quick and functional solution. Because any of the scripts can be easily edited, customizing the shopping cart is often simple. Except, as ever, when it isn't. :)
Security
This chapter does not deal with security issues, which are beyond the scope of this book. However, security is a very real issue, so here's a quick list of things to think about:
Communication between a browser and a server can be ...
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