Developer Sandbox for Red Het OpenShift gives you a renewable 30-day free access to an OpenShift cluster.
One of the activities associated with this free cluster is the ability to build an application using OpenShift's built-in source-to-image (s2i) technology. This technology pulls source code from a git repository and builds an application.
This sandbox-php repo, written in PHP (using the CakePHP framework), supports that example (i.e. s2i) for developers that are interested in the PHP programming language.
You can learn more here: https://developers.redhat.com/developer-sandbox/get-started]