In this post to his site Djordje Kovacevic shares the results of his evaluation of hosting providers in the platform-as-a-service arena for hosting PHP applications: OpenShift, Heroku and Fortrabbit.
I want PHP 5.6+, so I did some basic testing of those services to pick cheep and good solution to host my blog. OpenShift because I use it and it's free for 3 small gears, it was pretty good solution few years ago. Heroku because I used it for Ruby on Rails projects and they support multiple languages (even multiple build packs for one project)! I used FortRabbit too, so I decided to test theirs new apps.
For his testing he used a simple Laravel (v5.2) application with a handful of routes - something simple just to test out the setup and deployment processes. There is a "tl;dr" of the results but he also gets a bit more in-depth on what each service has to offer and some of the pros and cons of each. He also includes the results of some basic performance testing on the instances, linking to the raw output if you'd like to run your own metrics against it.