This document discusses continuous integration for PHP projects using Jenkins. It recommends automating builds multiple times per day by having all developers commit to the main branch daily and testing every commit. The document outlines best practices for continuous integration including using source control, automating builds, testing during builds, and automating deployments. It provides examples of plugins that can be used with Jenkins for PHP projects, including PHPUnit, Selenium, and tools for static analysis, complexity testing, and documentation.