In this new post to his blog Sean Coates talks about PHP as a templating language and why he (and Gimmebar) have decided to go another, more frontend-based direction.

For many years, I was a supporter of using PHP as a templating language to render HTML. However, I really don't buy into the idea of adding an additional abstraction layer on top of PHP, such as Smarty (and many others). In the past year or so, I've come to the realization that even PHP itself is no longer ideally suited to function as the templating engine of current web applications - at least not as the primary templating engine for such apps.

His reasoning is pretty simple - more and more web applications are becoming less and less server-driven. When building applications (and APIs) you don't know how the data will be consumed, so your frontend has to be agnostic. So, what's his current alternative of choice? The Mustache templating framework provides a simple way to create reusable templates (along with the compatible Handlebars Javascript library).