- From Volume I: Foundations:
- Chapter 1: PHP Basic
- Chapter 2: Object Oriented PH
- Chapter 3: PHP and MySQL
- From Volume II: Applications
- Chapter 1: Access Control
This informative collection is also available as a couple of books with several sample chapters available for download.
On a similar subject, I bumped into this page of advanced php resources also compiled by Harry at Sitepoint, something to extend your already long reading list.