PHP 5 Power Programming
To download the book for free as a pdf file click on downloads under
the More Information heading and a div will appear with the download
link.
Programming : PHP at wikibooks
This is an open content php textbook from wikibooks. It covers the
basic of the PHP language as well as some advanced concepts such as OOP
and templating.
Practical PHP Programming
This is an unpublished book on PHP. This book assumes no PHP
programming skill at all - you will be taught from scratch in that
respect. It appears to be quite comprehensive and can be navigated
online in tutorial fashion, so it serves as an online php book or php
tutorial.
Learning PHP 5 Sample Chapter
Chapter 8: Remembering Users with Cookies and Sessions
PHP Cookbook Sample Chapter
Chapter 8: Web Basics
Programming PHP Sample Chapter
Chapter 5: Arrays
A Programmer's Introduction to PHP 4.0
Free PHP book online that can be downloaded in pdf format.
PHP Session Management With Cookies
Book excerpt at O'Reilly.