Symfony 2.0 is a fast, flexible and easy to learn PHP Framework that is based on a innovative architecture. This flexible framework allows developers to build better and easy to maintain website with PHP.

Symfony 2.0 is up to 3 times faster than symfony 1.4 or Zend Framework 1.0 and consumes half the memory. Thanks to a simple and cohesive API, this full-featured open-source framework gets out your way and lets you enjoy coding again.

Symfony 2.0 borrows concepts from many frameworks like symfony 1, Django, Spring, and Ruby on Rails. It provides tools that greatly enhance the productivity of developers and also leverages well-known PHP libraries like the Zend Framework and Doctrine.

Features include:

• High Performance
• Better productivity
• Advanced Usability
• Easy learning
• Extensible
• Flexible
• Built for Developers
• Built-in security

Source: http://www.bitrepository.com/fast-flexible-and-full-featured-php-framework-symfony-2-0.html