Php-guide.7z

If a Bird class has a fly() method, a Penguin subclass shouldn't override it to throw an error, as this violates the expectation that all birds in the system can fly. I: Interface Segregation Principle (ISP)

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

The .7z extension indicates a compressed archive created with . In the context of a "PHP Guide," this archive likely contains: SOLID Principles in Laravel & PHP: A Practical Guide If a Bird class has a fly() method,

Classes should be open for extension but closed for modification. In the context of a "PHP Guide," this

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)

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)