Inheritance in PHP(OOPS Concept)

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Inheritance :- When a class derives from another class. The child class will inherit all the public and protected properties and methods from the parent. An inherited class is defined by using the extends keyword.

There are three type of Inheritance:

  1. Single inheritance

Single inheritance supports php. In a single class can be derived by one class unique. We require to have two classes in between this method. One is the parent class and the other a child class itself.

2. Multilevel inheritance 

In this type of inheritance, there will be more than 2 classes involved. In Multilevel inheritance Parent class will be inherited by a child and then further child class will be inherited by another child class.

3. Hierarchical inheritance

When more than one class inherit to a single class. This type of inheritance known as Hierarchical Inheritance

SINGLE INHERITANCE

Ex:-

https://gist.github.com/AvinashKumar33/745e6e3769016a43ac7072b64dd388c0

Output:-

Multilevel inheritance 

Ex:-

https://gist.github.com/AvinashKumar33/fdabd7b9d34f2d367c48d3fbb2ea72c8

Output:-

Hierarchical inheritance

Ex:-

https://gist.github.com/AvinashKumar33/fd56b51f174a149e18067a62f9318b52

Output:-

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