DevShed is starting off a new series today with this first article talking about how to introduce the "chain of responsibility" method in how you use your objects.

In this three-part series, I'll show you how to create a chain of responsibility across different classes, which hopefully will give you a better understanding of how this schema can be implemented with PHP.

Since it's just the first part in the esries, they start with the whys and hows of the chain of command process before getting on with the actual code. For the foundation, they create some subclasses that will make the parts of the chain. Next up is combining them and, finally, making the "master class" to combine the links of the chain together. They use a "DataServer" example to work with local files.