Explain about Abstract Class and PHP Interface?

Question

Accepted Answer

Abstract classes and interfaces are used to define common methods and properties for classes to implement.

Abstract classes cannot be instantiated and can contain both abstract and non-abstract methods.
Interfaces only contain method signatures and constants, and classes can implement multiple interfaces.
Abstract classes are useful for creating a base class with common functionality, while interfaces are useful for defining a contract for classes to follow.
Example: abstract class Animal { abstract public function makeSound(); } interface Flyable { public function fly(); }
Example: class Dog extends Animal { public function makeSound() { echo 'Woof!'; } } class Bird implements Flyable { public function fly() { echo 'Flying!'; } }

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