Pages that change are called dynamic pages. These can be template based or have small (or large) scripts embedded in them that execute either in the browser or on the server before the page is delivered to the browser.

When people start to learn the web they hear pretty quickly that they should “optimize” their pages. But a surprising number of people, even some big bloggers, don’t do it… I’m not sure the reasons, but I have a feeling some people find the process intimidating, while others just feel “Google should figure it out”. [...]

The echo command in PHP is one of the fundamental building blocks that’s used all the time. Mastering it’s use is something you want to as soon as you start to learn PHP.

PHP includes are one of the first things anyone using PHP uses. And they’re used in almost all professionally built sites. This post explains how they work and some of the tricks to use them effectively.

Apache, the web server software that runs most web sites, provides the developer with basic information about the page request via what are called “environment variables”. This post explains how to access Apache environment variables using PHP, and some tricks to use them effectively.