PHP OOP extends example

<?php




// The parent class has hello method that returns "beep".
class Car {

 //A private property or method can be used only by the parent.
  private $model;
  private $price;

    public function __construct() {
        echo "construct car";
    }



  public function hello()
  {
    return "beep";
  }

   public function setModel($model)
    {
        $this ->model = $model;
    }

    public function getModel()
    {
        return $this ->model;
    }

    public function setPrice($price)
    {
        $this->price = $price;
    }

    public function getPrice()
    {
        return $this ->price;
    }

}

//The child class has hello method that returns "Halllo"
class SportsCar extends Car {

    public function __construct() {
        parent::__construct();
    }
    public function raceMode() {
        $this->price += 3000;
    }
}

//The child class has hello method that returns "Halllo"
class FamilyCar extends Car {

}

//Create a new object
$sportsCar1 = new SportsCar();

//Get the result of the hello method
$sportsCar1->setModel("Fiat 500");
$sportsCar1->setPrice(5000);
$sportsCar1->raceMode();
echo $sportsCar1->getModel();


$familyCar1 = new FamilyCar();

//Get the result of the hello method
$familyCar1->setModel("Fiat multipla");
$familyCar1->setPrice(1000);

echo $familyCar1->getModel();