I am planning on working on a game that has a PHP back-end to communicate with the data repository. I was thinking about it and concluded that the best design paradigm to follow for our game would be event driven. I am looking to have an achievement system (similar to the badges system of this website) and basically I would like to be able to hook these "achievement checks" into a number of different events that occur in the game. ie:
When a user does action X hook Y is fired and all attached functions are called to check against an achievement requirement.
In structuring the architecture like this I will allow for new achievements to be added easily as all I will have to do is add the checking function to the proper hook and everything else will fall into place.
I'm not sure if this is a great explanation of what I intend to do, but in any case I am looking for the following:
- Good reference material on how to code an event-driven application
- Code snippet(s) showing how to put a "hook" in a function in PHP
- Code snippet(s) showing how to attach a function to the "hook" mentioned in point 2
I have a few ideas as to how to accomplish 2) and 3) but I was hoping that somebody well-versed in the matter could shed some light on best practices.
Thank you in advance!