This is not a tutorial that boasts about how much it teaches you. On the contrary, its boast is the opposite: That with very little, you can begin writing software fit for running on the Web, or a LAN behind a web server. An increasing amount of software is being written this way, inspired by Google and other Web 2.0 experience.
If you already know programming, I don't need to teach you much, before you can get started. You want to know