What is the difference between an abstract class and an interface in PHP? Give real-world use cases.

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Accepted Answer

Abstract classes can have implementation; interfaces cannot. Both define contracts for subclasses but differ in flexibility and usage.

An abstract class can have both abstract methods (without implementation) and concrete methods (with implementation).
An interface can only declare methods (abstract) and cannot provide any implementation until Java 8 introduced default methods.
A class can inherit from only one abstract class (single inheritance), but it can implement multiple interfaces (multiple inheritance).
Example: In Java, 'abstract class Animal' can have a method 'eat()' with implementation, while 'interface Flyable' can only declare 'fly()'.
Abstract classes can have member variables, while interfaces can only have static final variables (constants).

Accepted Answer

An abstract class is used as a base class from which other classes can inherit, it cannot be instantiated on its own and it uses the "extends" keyword while an interface is a contract that defines a set of method signature that a class must implement and it uses implements keyword.

Accepted Answer

Abstract class and interface both are used to achieve abstract where we can declare the abstract methods.abstract class and interface both can't be instraniated .abstract class can have abstract and non abstract method.interface can have only abstract methods.it can have default and statics methods also.abstract doesn't support multiple inheritance.interface support multiple inharitance.

Example:-public abstract

Class shapes{

Public abstract

Void draw( );

}

Exams:-public interface

Drawable{

Void draw( );

}

Accepted Answer

Abstract class and interface both are used to achieve abstraction where we can declare the abstract methods. Abstract class and interface both con't be instantiated

Accepted Answer

abstract class :- It allows you to create functionality that subclasses can implement or override.

interface :- only allows you to define functionality, not implement it.

it Supports multiple inheritance.

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What is the difference between an abstract class and an interface in PHP? Give real-world use cases.

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