Chapter 3. The Common Gateway Interface

Now that we have explored HTTP in general, we can return to our discussion of CGI and see how our scripts interact with HTTP servers to produce dynamic content. After you have read this chapter, you'll understand how to write basic CGI scripts and fully understand all of our previous examples. Let's get started by looking at a script now.

This script displays some basic information, including CGI and HTTP revisions used for this transaction and the name of the server software: