In a new post to his site Cees-Jan Kiewiet walks you through the process to extend the ReactPHP project's child process handling (the first part of a series of posts).

react/child-process is very flexible and can work a lot of ways but sometimes you don't want to be bothered with the details of how it works and just want a simpler API to do that.

He then covers two packages where he used this "simpler is better" mentality and wrapped the current ReactPHP handling in a simpler API: one for defining "promises" on the child process and the other handles the messaging between the child and parent processes. He includes code examples for each of these, showing them in use to create simple operations.