To support symfony 2's development, Fabien Potencier '" the lead developer of the symfony framework '" has released four new PHP 5.3 based components. [...] Though these components will be used by Symfony 2, they're built to be standalone components that can be easily used in any PHP 5.3 project.

The post lists each of them out including features and some sample code as well as a brief look (mostly code) at using to locate specific contents in a page.