When I first came across Heroku it was a Ruby-only cloud service. I wasn’t a Ruby developer so I quickly forgot about it. But then they partnered with Facebook and you could create a Facebook app hosted on Heroku with the Facebook PHP-SDK in just a couple of clicks. Now the question: is it possible to create a PHP application with Heroku that works both outside and inside of Facebook?
Build Your App in the Cloud with Heroku and the Facebook SDK