Elastic Beanstalk has long since added first-class support for PHP. There are still advantages to running PHP via Quercus, but for >99% of applications the basic PHP support is likely fine.
This project is meant to show how you can run PHP on Amazon's Elastic Beanstalk service.
It's setup as a Maven project and uses Quercus, a "100% Java implementation of PHP 5," to run PHP in a Tomcat container.
From the project root, run 'mvn package' to create the deployable war file. Once complete, upload to AWS Elastic Beanstalk.