Ask: What books would you recommend for PHP to catch up on progresses in PHP?

I have pretty good understanding of OOP, MVC etc. I mainly develop with PHP at work. I use CodeIginter, Zend Framework 1 without any issues.

But I have been looking at modern PHP frameworks like Laravel 4 and related libraries. And I am having tough time understanding big picture of things. Like when designing application where I should use traits, closures, etc

Perhaps I have been using older PHP too long and forgotten advanced OOP principles. I want to quickly update my understanding of OOP in modern PHP frameworks.

I tried Code Bright specifically for Laravel, but found it that it was more of how to book rather concepts book.<p>Is there any books you would recommend?

Thanks

Amer