Constructor automatically initializes object properties when an instance is created.

Defined by __construct()

Syntax-

class MyClass {
    public function __construct($param1, $param2) { /* constructor code */ }
}

$obj = new MyClass($value1, $value2);

Example-

<?php
class Car {
    public $brand;
    public $color;

    public function __construct($brand, $color) {
        $this->brand = $brand;
        $this->color = $color;
    }
}
class ElectricCar extends Car { }
class PetrolCar extends Car { }
$car1 = new ElectricCar("Tesla", "White");
$car2 = new PetrolCar("Toyota", "Blue");
echo $car1->brand . " " . $car1->color . "<br>";
echo $car2->brand . " " . $car2->color;

?>

• Car - Parent class
• ElectricCar and PetrolCar - Child classes
• Both child classes inherit brand and color from Car.