I've built my first PHP website, now I'm looking to refine the directory structure a bit but I can't seem to find the resource I'm looking for. A while back, I remember seeing something in regards to how the directory is supposed to be structured for all your PHP scripts. Something like you'd have a Module folder, then a Controller folder, ect.

I'm not sure if this method of site design is necessary, but if you'd kindly point me to where I can read up on this model, that'd be great