In this recent post Anthony Ferrara has a new post showing how he created a multi-version build system to make working with multiple PHP installs (different versions) simpler....with the help of Jenkins.

I've been using Jenkins to manage builds of my projects for a while now. This was fine for a while, but now that my projects need to support multiple versions of PHP, it left something to be desired. I wanted a system that could build against multiple versions of PHP. And more so, I wanted to be able to build against multiple compiles of the same version (different options, etc). This is how I built just such a system...

He gives an overview of the Jenkins system, the hardware and operating system that runs the server as well as examples of his "php-build" command to generate the different environments. He uses a modified version of the PHP template for Jenkins as a base.