The PHP Anthology

The PHP Anthology is a complete reference guide for any PHP developer—hobbyist or professional—to help you write better, faster and more secure code that solves common problems. The author, Harry Fuecks, has compiled over 100 best-practice solutions that any developer will find invaluable when building content management systems, intranets, shopping carts or anything else.
In the second Volume volume of The PHP Anthology you’ll:

find out all about user authentication using PHP, including creating a user registration system that supports user groups and permissions.

learn to parse RSS feeds using the SAX and DOM APIs, and also create your own RSS feeds generate PDFs, SVG images and WAP-enable your Website

more the various ways of collecting site statistics and traffic information so you can improve the user experience on the sites you build

speed up your site by caching pages, both client and server-side to dramatically increase performance and decrease bandwidth usage

optimize your code, learn about N-Tier application design, and minimize errors with unit testing

learn how to apply five traditional software design patterns to real problems in PHP