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)
A high-level OrderManager should depend on a generic PaymentProcessorInterface rather than a specific PayPalPayment class. 📦 Understanding the .7z Context
Classes should be open for extension but closed for modification. php-guide.7z
Depend on abstractions (interfaces), not concrete implementations.
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) Instead of one massive WorkerInterface , create smaller
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)
Objects of a superclass should be replaceable with objects of its subclasses without breaking the application. It should not directly calculate payroll or send
The request for a "solid story" for php-guide.7z refers to the of Object-Oriented Programming (OOP) applied to PHP development. These five design principles—Single Responsibility, Open-Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion—form the "story" or fundamental logic for writing maintainable, scalable, and professional PHP code. 🧩 The SOLID Framework for PHP