Publisher: Wikibooks 2012
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.
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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 Vikram Vaswani - Zend Developer Zone
This book caters for the absolute beginners to the intermediate and advanced PHP developers. It takes you through from what is a variable to a nice snippet the author found on backing up a databases or their individual individual tables.
by Davey Shafik - O'Reilly Media
PHP 7 -- the most dramatic update to the language in over a decade -- has arrived. This book provides you with a short guide to the major changes in this new release, including a revamped engine, a bunch of new features, and lots of language cleanup.
by Mario Lurig
A collection of over 250 PHP functions with clear explanations in language anyone can understand, followed with examples. The book includes numerous additional tips, the basics of PHP, MySQL query examples, regular expressions syntax, etc.