In this new tutorial from DeveloperTutorials.com today, they explain how to create an "easy site navigation" on your pages - using a _GET variable to move between sections.

You may have seen other methods on other websites that use switches to include the page, I dislike that method (switch()) because you have to add a case for each page. Here, all you have to do is make the file, and link to it.

I'm just going to go on the record here and say that using something like this is a bad idea. Not only does it make it hard to add sections and the like later on, but it opens a rather large security hole by allowing the user to define anything that the script is going to include.

I wouldn't really recommend using this one...