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PHP Academy · Lesson

Extending Classes with Inheritance

Use extends to build class hierarchies and override methods.

Intro: PHP Inheritance

Inheritance lets a class (child) reuse and extend the code of another class (parent) using the extends keyword. PHP supports single inheritance.

Key Concepts

Key concepts:

  • Child inherits all public/protected members
  • Override parent methods to change behavior
  • Call parent method with parent::
  • Use final to prevent overriding

All lessons in this course

  1. Extending Classes with Inheritance
  2. Abstract Classes and Methods
  3. Implementing Interfaces
  4. Traits for Code Reuse
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