Richard Davey - The Good, the Bad and the Ugly:
“The ease of developing with PHP has lead to the creation of this script gold mine, and while it can be a wonder to explore there are many factors you should take into consideration before going on a downloading frenzy.
Will the script you are about to install bring your server to a halt? Does it open up glaring security issues? Is there a mess of complex and poorly written code behind the sleek HTML exterior? In this article we get our pick axes ready, delve deep and bring back examples that serve one purpose: to show you what to look out for in other peoples code. By looking at good, bad and just downright ugly snippets of code you can gain a far better understanding of the overall quality of a PHP script.”