On the Developer Tutorials website, they're posted this new article talking about a simple way to create PDFs with PHP:

[PDFs] also serve as a perfect way of allowing your users to download or email a page from your website. In this tutorial, I'll show you how to generate PDF files in pure PHP and distribute your content in a single, consistent format.

They look at the why behind creating PDFs in PHP, what options you have and an example creating a basic "hello world" PDF.