Event Sourcing has been around for a while and has proven itself to be both very useful and, at the same time, very complex. Event stores, eventual consistency, CQRS, distributed service, etc… There won’t be any of this. Instead, we are going to look into the very basic philosophy of event sourcing—the ABCs. We’ll let the complexity be handled by somebody else. Along the way, we’ll illustrate what we are talking about with some PHP examples. If you have no or little idea about event sourcing, then this talk is for you.