Besides writing an AJAX book, I’ve written a number of number of articles on this blog. These articles mainly cover AJAX topics but some are also about PHP in general.
Getting Started with AJAX
In 2005 at the beginning of my AJAX writing career I wrote a series of 3 articles building some Hello World style applications using AJAX. Now these apps do more then just print Hello World but they don’t do anything useful. All three libraries provide RPC style AJAX functionality and these articles focus on that use case. If you want to get started doing RPC style AJAX these articles are a good place to start. Reading all three is also a good way to compare a couple libraries.
In August of 2006 I wrote a pair of articles about upgrading the site for WebThumb using AJAX. This upgrade used mootools and HTML_AJAX. Its a good starting point for someone who is looking for a real life AJAX use case. It also shows some basic polling techniques you can use for keeping data fresh on a site.
AJAX File Uploads
These AJAX file upload articles are some of the most popular I’ve ever written. They cover the basics of building an AJAX/PHP file uploader that provides feedback using a progress bar. If you just want working code read the first article. The code is pretty robust and should even work without the upload progress meter extension.
Question and Answers to AJAX questions. The questions cover a lot of group so its a good place to look if your wondering how to do something. Of course feel free to contact me with any other AJAX questions you might have.