Tomas Votruba has written up a new post to his site covering the sorting of private methods in classes and why he considers it important to the quality of your code.

When I started PHP in 2004, all you had to do is to learn a few functions to become the most senior dev in your town. Nowadays, devs have to learn a framework, IDE and coding patterns to get at least to an average level.

Instead of reading 346 pages of Clean Code, you need to produce code and learn as you read it at the same time. There will be never less information than it is today. That's why effective learning is a killer skill. Today we learn how to sort private methods in 2 mins.

He starts off by talking about why private method ordering is important, giving an example of a simple class with several private methods. He suggests that, by ordering private methods within the class more related to the functionality that uses them, developers in the system can more easily relate the functionality. He also includes an example of his the PrivateMethodOrderByUseFixer coding standard service to automate this in your code.