A high-level OrderManager should depend on a generic PaymentProcessorInterface rather than a specific PayPalPayment class. 📦 Understanding the .7z Context
Instead of one massive WorkerInterface , create smaller interfaces like WorkableInterface and SleepableInterface so a robot class isn't forced to implement a sleep() method. D: Dependency Inversion Principle (DIP)
You should be able to add a new payment method (e.g., Stripe) by creating a new class that extends a base interface, rather than rewriting your existing checkout logic. L: Liskov Substitution Principle (LSP) php-guide.7z
Depend on abstractions (interfaces), not concrete implementations.
The acronym represents five essential rules for high-quality software architecture: S: Single Responsibility Principle (SRP) A high-level OrderManager should depend on a generic
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)
Classes should be open for extension but closed for modification. O: Open-Closed Principle (OCP) Classes should be open
A class should have one, and only one, reason to change.