Php-guide.7z

A class should not be forced to implement methods it does not use.

A class should have one, and only one, reason to change. php-guide.7z

In Laravel or standard PHP, a UserController should only handle HTTP requests. It should not directly calculate payroll or send emails; those tasks belong in separate services or observers. O: Open-Closed Principle (OCP) A class should not be forced to implement

A high-level OrderManager should depend on a generic PaymentProcessorInterface rather than a specific PayPalPayment class. 📦 Understanding the .7z Context and only one

The acronym represents five essential rules for high-quality software architecture: S: Single Responsibility Principle (SRP)

Classes should be open for extension but closed for modification.