Laravel: The Fantastic 4 Interfaces — Responsable

https://blog.usejournal.com/laravel-the-fantastic-4-interfaces-responsable-c9d0e18f05fd
Way down in the weeds with laravel: the Responsible interface.

Object-Oriented Programming — The Trillion Dollar Disaster

https://medium.com/better-programming/object-oriented-programming-the-trillion-dollar-disaster-%EF%B8%8F-92a4b666c7c7
File this one under "unpopular opinions"

SOLID Principles every Developer Should Know

https://blog.bitsrc.io/solid-principles-every-developer-should-know-b3bfa96bb688
Good examples of SOLID principles. Some of these are fairly painful.

Injectables vs. Newables

https://qafoo.com/blog/111_injectables_newables.html
One of the more cogent explanations of Injectibles vs. Newables in PHP I've ever read.

Goodbye controllers, hello request handlers

https://jenssegers.com/85/goodbye-controllers-hello-request-handlers
interesting take on the evolution of the MVC pattern.

The Open/Closed Principle

http://patrick.louys.ch/2016/12/11/open-closed-principle/
the open/closed principle in OOA&D is often misunderstood. Here's an work-through in PHP:

Object Oriented Programming is an expensive disaster which must end

http://www.smashcompany.com/technology/object-oriented-programming-is-an-expensive-disaster-which-must-end

I may have cited this before, but a lengthy and well-though-out indictment of #oop and its use in #php