Recipes for Decoupling

How can you make all of this easier for yourself and the future maintainers of the project? The keyword is "decoupling". You can change the design of your code to defend it against changes in any dependency your project relies on. Decoupling your code is a way to make it future-proof (without doing too much work that "you ain't gonna need").
About 10 years ago I started looking for ways to decouple my code, but at first I struggled to do it effectively. My code was decoupled in the wrong places, or in the wrong way. I got a better view on this topic after several intense experiences with some legacy projects, a big framework migration, and a complete project rewrite (that I'm sure could have been prevented). I've collected many recipes for decoupling along the way. This book gives you a practical overview of common situations that suffer from an often unintended high level of coupling in web applications. Of course, it also gives you step-by-step recipes to improve these situations. The examples in this book show you how to decouple from your web framework, templating engine, test framework, ORM, and so on.
Decoupling is one thing, but staying decoupled is something else entirely. That's why in this book we focus on how to solidify the decoupling rules with PHPStan, the automated static analysis tool for PHP. That way we don't have to rely on discipline and code reviews, but can let a tool point out possible coupling mistakes.


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