By now you have a basic understanding of how to enter PHP code. We will comment our code liberally throughout this book, and we certainly hope you will, toothere is nothing more frustrating than coming back to a piece of code after a few months and not having any idea how it works (or being a new member on a project who is presented with a mess of code without documentation). We have also seen some of the data types with which we will work in PHP, and some useful functions to help us debug and learn while we program.
In the next chapter, we will continue our tour of the PHP language. We will learn more about data types available to us and also how one converts data from one type to another. We will then learn about the various control structures we can use to have our code make decisions and repeat actions. We will also cover variables and constants in PHP how to access them from within your code, and how the PHP language engine handles them.