In this chapter, we have seen that strings are a powerful and useful type in PHP, as long as we pay attention to character set issues that might appear when working with an increasingly global Internet. There is not much standing in the way of our writing web applications that support any number of alphabets from around the world. As long as we use the mbstring functions and are careful how we process and manipulate strings, we will not run into many problems.
In the next chapter, we will take a closer look at how our scripts interact with the server, how an end user of our web applications enters data, and how our scripts receive the data. We will also see what we can do in code to learn about the environment in which our PHP scripts are executing.