Loïc Faugeron, author of the recent "Ultimate Guide" to Symfony components series has a new kind of post to his site today. In this latest article he shows you how to integrate Symfony and ReactPHP for "super speed Symfony" sites.
HTTP frameworks, such as Symfony, allow us to build applications that have the potential to achieve Super Speed.
A first way to make use of it is to run our application as a HTTP server. In this article we'll take a Symfony application and demonstrate how to run it as HTTP server using ReactPHP.
He walks you through the installation of the ReactPHP HTTP server and provides some simple code to get a server up and running. He uses this to provide a "Hello world" example and helps you test it to be sure everything's up and running as expected. He then creates a basic Symfony application that uses the
HttpFoundationRequest handling to wrap that same server and yield the same results. He includes some benchmarking examples and some updates he needed to make to have it work correctly with the Blackfire.io profiling service. He ends the post with a look at some of the alternatives to ReactPHP (including IcicleIO, Aerys and PHP FastCGI), why it improves performance and how to make it production ready with  Supervisord(http://supervisord.org/).