<?php

class Airplane implements IVehicle
{

    /**
     * @var bool
     */
    protected $leftEngine;

    /**
     * @var bool
     */
    protected $rightEngine;


    public function start()
    {
        $this->leftEngine = true;
        $this->rightEngine = true;
    }

    public function stop()
    {
        $this->leftEngine = false;
        $this->rightEngine = false;
    }

    public function status()
    {
        return $this->leftEngine && $this->rightEngine ? "Flugzeugmotoren eingeschaltet" : "Flugzeugmotoren ausgeschaltet";
    }
}