Recently I found a book which is related to Symfony 2. The book is called Extending Symfony 2 Web Application Framework by Sebastien Armand. So I made a brief review about it. Find my review below.
I would say, Extending Symfony 2 Web Application Framework by Sebastien Armand is one of the few knowledge sources out there in the market which seriously discuss Symfony 2 in many directions. The book is organised in valuable six chapters and guides you through a real time social website (meetups) example. These chapters contains many deep discussions regarding Symfony 2 services, listeners, dependency injection, commands, templating engine including Twig, database layer of Doctrine including creating a your own data type and so much more. Also this book covers a handy discussion regarding ensuring the security and increasing the performance while maintaining a good solid code. As an overall, this book is ideal for someone who is already familiar with Symfony 2 framework, but loves to enhance and polish their thorough understanding about Symfony 2, tailor / structurize pre build applications using much effective approaches and developing easily shareable bundles.
Where you can buy the book :- http://www.packtpub.com/extending-symfony-2-web-application-framework/book