We are happy to announce that we have published the source code for building PHP, Python, and Ruby bindings for PDFNet. Please see the blog post here: http://blog.pdftron.com/2014/02/28/pdf-sdk-bindings-for-php-python-and-ruby/
The Github repository for the language bindings is: https://www.github.com/PDFTron/PDFNetWrappers
Please see the README.md to get started.