A Gentle Introduction to symfony
by Francois Zaninotto, Fabien Potencier
Publisher: Sensio SA 2010
A Gentle Introduction to symfony introduces you to the leading framework for PHP developers, showing you how to wield its many features to develop web applications faster and more efficiently, even if you only know a bit of PHP.
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by Fabien Potencier, Ryan Weaver - Sensio SA
A book about more advanced symfony topics. If you've ever wanted to know how symfony works under the hood or if you'd like to extend the framework in various ways to make it work for your specific needs, this book is for you.
by Penn Wu - The Global Text Project
This online book covers all areas of PHP in detail: the basics of the language, file and filesystem handling, object oriented programming, MySQL and SQLite database access, handling of HTML forms, using cookies and PHP sessions.
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.