PHP Reference: Beginner to Intermediate PHP5
by Mario Lurig
Number of pages: 163
A collection of over 250 PHP functions with clear explanations in language anyone can understand, followed with as many examples as it takes to understand what the function does and how it works. This book includes numerous additional tips, the basics of PHP, MySQL query examples, regular expressions syntax, and two indexes to help you find information faster: a common language index and a function index.
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by Pádraic Brady
A free book about Zend Framework for the PHP programming language. This is a survival guide, boosting your understanding of the framework and how it all fits together by following the development of a single application from start to finish.
by Luis Atencio - Leanpub
I provide a practical approach to functional programming and show how it compares to other programming paradigms. The book is filled with examples that showcase functional concepts, plus using PHP in a ways you've probably never though it could.
by Dayle Rees - daylerees.com
Laravel Code Bright will contain a complete learning experience for all of the framework's features. The style of writing will make it approachable for beginners, and a wonderful reference resource for experienced developers alike.
A comprehensive guide to programming in PHP. Topics: Learning the Language - basics; Advanced PHP - Data Structures, Object Oriented Programming (OOP), Templating, Libraries, Frameworks, Security, Command-Line Interface (CLI); etc.