This session will introduce event-driven programming using the React PHP library. Combined with non-blocking IO streams, event-driven programing is ideal for tasks such as client/server applications and asynchronous libraries. Akin to Node.js or Python's Twisted, React makes this possible in PHP by providing all the necessary pieces in a well-packaged framework. This session will introduce the concept of event loops and async programming in PHP, and explore ways it can serve in your technology stack.