Fundamentals

Today is a great day: you will begin to develop the new greenfield project of the soon-very-successful startup you work for, as a PHP Ninja Wizard of the Crown. But wait! You're teaming with Dave, your colleague developer! He's creating an Anemic Domain Model! Why? Is it that bad?

The DRY principle (Don't Repeat Yourself) is easy to understand but difficult to apply. Should we never repeat our code? What was the true purpose of the principle's authors? Let's decipher what should be DRY in our code, and what should not.