Happy Coders

In PHP, classes and objects are the foundation of Object-Oriented Programming (OOP). A class defines the structure (properties and methods), and an object is an instance of that class.

1. Create a Class

class Car {
    public $brand = "Toyota";  // Property

    public function honk() {   // Method
        return "Beep beep!";
    }
}

2. Create an Object

$myCar = new Car();              // Create object
echo $myCar->brand;              // Access property → Toyota
echo $myCar->honk();             // Call method → Beep beep!

3. Add a Constructor

class User {
    public $name;

    public function __construct($userName) {
        $this->name = $userName;
    }

    public function greet() {
        return "Hello, " . $this->name;
    }
}

$user = new User("John");
echo $user->greet(); // Output: Hello, John

File: user_class.php

4. Class with Multiple Properties and Methods

class Product {
    public $name;
    public $price;

    public function setDetails($name, $price) {
        $this->name = $name;
        $this->price = $price;
    }

    public function getDetails() {
        return "Product: {$this->name}, Price: ₹{$this->price}";
    }
}

$p = new Product();
$p->setDetails("Laptop", 45000);
echo $p->getDetails();

File: product_class.php

5. Access Modifiers (Public, Private, Protected)

class Account {
    private $balance = 1000;

    public function getBalance() {
        return $this->balance;
    }
}

$acc = new Account();
echo $acc->getBalance(); // Output: 1000

File: account_class.php

Summary Table