Polimorfism example in PHP

polymorphism.php

<?php

interface IVehiculo
{
  public function setName($name);
  public function getName();
}

abstract class Vehiculo implements IVehiculo
{
  private $name;

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

  public function getName(){
    return $this->name;
  }
}

class Autobus extends Vehiculo{}

class Moto extends Vehiculo{}

class Game
{
  public $vehiculo;

  public function estacionar(IVehiculo $vehiculo)
  {
    return $vehiculo->getName();
  }
}

$game = new Game();
$autobus = new Autobus();
$autobus->setName('Autobus');
$moto = new Moto();
$moto->setName('Moto');
echo $game->estacionar($autobus).'<br/>';
echo $game->estacionar($moto);