On the Custom Scripts blog they've shared a new tutorial showing you how to use the popular PHP templating tool Twig to create dyanmic layouts for your application.

Recently I worked on a project that needed dynamic layouts for each bundle. The idea was to have a base template, then several layout templates that each extends from the base. Each view would then extend from one of the layout files.

In the scenario I had, I needed to allow each bundle to specify there own stylesheets and javascripts. So each bundle needed to create a custom layout that overrides the parent stylesheet and javascript block adding their own content, and I did not want to re-create the layout files for each bundle.

He's created a base template for the entire site leaving areas for stylesheet and javascript injection as well as making it flexible enough to accept multiple column layouts. Layered on top of this is a base template for each bundle that's then extended via a custom extension class as needed. The PHP is also included to define this and the other extension classes you'll need to make the setup work.