<?php

//Define the Vehicle interface
interface Vehicle
{
    public function addLuggage($strContainer);
}

//Define the Car class
class Car implements Vehicle
{
    var $arrLuggage=array();
    var $strCarType;

    function __construct($luggage = null)
    {
        if($luggage){
            $this->addLuggage($luggage);
        }
    }

    function addLuggage($strContainer)
    {
        $this->arrLuggage[]=$strContainer;
    }
}

class Sports extends Car
{
    function __construct($luggage = null)
    {
        $this->strCarType="Sports";
        parent::__construct($luggage);
    }

    function addLuggage($strContainer) {
        if($strContainer->strLuggageType!="Suitcase") {
            parent::addLuggage($strContainer);
        } else {
            //Throw exception if luggage type for Sports car is Suitcase
            throw new Exception("The luggage doesn't fit");
        }
    }
}

class StationWagon extends Car
{
    function __construct($luggage = null)
    {
        $this->strCarType="StationWagon";
        parent::__construct($luggage);
    }
}

//Define the Container class
class Container
{
    var $strLuggageType;

    function __construct()
    {

    }
}

class Suitcase extends Container
{
    function __construct()
    {
        $this->strLuggageType="Suitcase";
    }
}

class Bag extends Container
{
    function __construct()
    {
        $this->strLuggageType="Bag";
    }
}

$objNewCar=new Sports(new Bag());

$objNewCar=new Sports(new Suitcase());

print_r($objNewCar->arrLuggage);

?>