PHP Object-Oriented Programming

Learn PHP OOP - classes, objects, inheritance, encapsulation, and polymorphism. Master object-oriented programming in PHP for better code organization.

Emily Rodriguez

December 19, 2025

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Object-Oriented Programming (OOP) helps you write better, more organized code. PHP supports OOP features that make development easier and more maintainable.

Classes and Objects

Classes are blueprints for objects. Objects are instances of classes. Understanding this relationship is fundamental to OOP.

Properties and Methods

Properties store data, methods perform actions. Learn how to define them, use visibility modifiers (public, private, protected), and access them.

Constructor and Destructor

Constructors initialize objects when created. Destructors clean up when objects are destroyed. These are special methods that run automatically.

Inheritance

Inheritance lets you create new classes based on existing ones. Child classes inherit properties and methods from parent classes. This promotes code reuse.

Encapsulation

Encapsulation means hiding internal details and exposing only what's necessary. Use private and protected to control access to properties and methods.

Polymorphism

Polymorphism allows objects of different classes to be treated the same way. It's a powerful feature that makes code flexible and extensible.

#PHP#OOP#Classes#Objects

Common Questions & Answers

How do I create classes and objects in PHP?

Use class keyword to define class. Use new keyword to create objects. Define properties and methods inside class. Use $this to access object properties and methods. Use visibility modifiers (public, private, protected).

php

Run Explain

<?php
class Car {
    public $brand;
    public $model;
    private $price;
    
    public function __construct($brand, $model, $price) {
        $this->brand = $brand;
        $this->model = $model;
        $this->price = $price;
    }
    
    public function getInfo() {
        return $this->brand . " " . $this->model;
    }
    
    public function getPrice() {
        return $this->price;
    }
}

$car = new Car("Toyota", "Camry", 25000);
echo $car->getInfo();
echo $car->getPrice();