The Tomahawk PHP Framework.
TomahawkPHP is a PHP 5.3 full-stack web framework built on top of the Symfony2 Components.
TomahawkPHP is only supported on PHP 5.3.3 and up.
Be warned that PHP versions before 5.3.8 are known to be buggy and might not work for you:
before PHP 5.3.8, if you get an error involving annotations, you've hit a known PHP bug (see https://bugs.php.net/bug.php?id=55156).
PHP 5.3.16 has a major bug in the Reflection subsystem and is not suitable to run TomahawkPHP and Symfony2 Components (https://bugs.php.net/bug.php?id=62715)