? PHP OOP Overriding Properties & Methods

? Quick Overview

Overriding in PHP Object-Oriented Programming allows child classes to redefine properties and methods inherited from parent classes. This enables flexible behavior and supports polymorphism.

? Key Concepts

• Child class replaces parent method logic
• Property values can be redefined
• Method signatures must remain compatible
• parent:: can access original behavior

? Syntax / Theory

When a child class defines a method or property with the same name as its parent, PHP uses the child version during runtime. This makes behavior customizable without changing base classes.

? Code Example

// Parent class definition
<?php
class ParentClass {
public $name = "Parent";

public function greet() {
echo "Hello from Parent!";
}
}

// Child class overriding property and method
class ChildClass extends ParentClass {
public $name = "Child";

public function greet() {
echo "Hello from Child!";
}
}

// Creating object of child class
$child = new ChildClass();
echo $child->name;
$child->greet();
?>

? Live Output / Explanation

The output displays Child as the property value and prints the child class greeting message. PHP prioritizes the overridden definitions in the child class.

? Interactive Concept

Imagine a blueprint system where the base design is reused, but details are customized per requirement — overriding works the same way in OOP.

? Use Cases

• Customizing behavior in frameworks
• Extending base classes safely
• Implementing polymorphism
• Code reuse with flexibility