The slides of the try out of my new talk "CQRS & event sourcing in the wild" - held at PHP Amersfoort in September 2016. CQRS & event sourcing are currently very popular topics in the PHP community. However, most blogs and talks focus on the theory, simple applications or introductions to one of the CQRS / event sourcing frameworks currently available for PHP, not necessarily the challenges of a production deployment. In this session we will try to bridge that gap and look at some of the issues that popped up during a real-world deployment of an event sourced application. We’ll discuss a few strategies to deal with these issues and how they would apply to current PHP event sourcing frameworks.