PHP & MySQL
PHP Filters – “A collection of easy to include PHP functions that sanitize user inputs.”
JeffCroft.com: Getting favicons for inclusion in pages? This may provide a better method than the one I have implemented on this site.
Simple Templating from mezzoblue provides a straightforward and solid templating system. I’ve typically followed the same type of practice on my sites, though Dave Shea’s practice of setting the body class as a variable was a new idea to me – one which I will adopt.
Even cooler is the use of a PHP array to provide the flexibility of using different style sheets per page. I’ve needed this functionality in past projects, but hadn’t solved the issue anywhere near as elegantly.
Being a PHP Lumberjack is a great article on the importance of logging within PHP. While I already use some of the methods shown in the article, I learned a lot, and I plan to implement the ideas in my work. The article does a great job describing the various options available, and more importantly, discusses the times to use each.