PHP Interfaces
Defining interfaces.
PHP - What are Interfaces?
Interfaces allow you to specify what methods a class should implement.
Interfaces make it easy to use a variety of different classes in the same way. When one or more classes use the same interface, it is referred to as "polymorphism".
Interfaces are declared with the interface keyword.
Interface vs Abstract Class
- Interfaces cannot have properties, while abstract classes can
- All methods in an interface must be public, while abstract class methods is public or protected
- All methods in an interface are abstract, so they cannot be implemented in code and the abstract keyword is not necessary
- Classes can implement an interface while inheriting from another class at the same time