SOLID

SOLID is an acronym for a set of OOP design principle. They were coined by Robert C. Martin (also known as Uncle Bob).

• S : Single Responsibility Principle

• O : Open Closed Principle

• L : Liskov Substitution Principle

• I : Interface Segregation Principle

• D : Dependency Inversion Principle

Each principle may be used independently. Those principles are not dedicated to PHP, though they are used with PHP.

Documentation

See also Solid Relevance, SOLID principles in PHP

Related : Single Responsability Principle (SRP), Open Closed Principle (OCP), Liskov Substitution Principle (LSP), Interface Segregation Principle (ISP), Dependency Injection