Securing PHP Web Applications

2 Error Handling

In Chapter 1, “Security Is a Server Issue and Other Myths,” we discussed the need to integrate security measures into every application. In this chapter, we tackle one of the most basic ways you can secure your application: handling erroneous data.

The Guestbook Application

This chapter also gets us into the sample application we’ll be working on throughout the book. It’s a simple guestbook application, but as you’ll see, there is plenty of room for security holes even in the smallest program. If you haven’t written your application, be sure to read through Chapter 16, “Plan A: Designing a Secure Application from the Beginning.”

Program Summary

The guestbook application will allow visitors ...