PHP OOPLesson 48Free preview

PHP Inheritance

This lesson is part of PHP · All levels

Summary

Inheritance makes one class (child) inherit property and method from another class (parent) with keywords extends. Child can use the parent code as it is or replace it with the override method. PHP only supports single inheritance, which means that one class has only one parent class, but one parent can have many children.

Key points

Extends are used by child classes to inherit parent members.
The parent method can be override by defining the same method in the child.
Parent::__construct() is used to run the parent constructor of child.
Abstract and private members cannot be used as ordinary inheritance.

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