FactoryMethod.php

<?php

namespace DesignPatterns\FactoryMethod;

/**
 * class FactoryMethod
 */
abstract class FactoryMethod
{

    const CHEAP = 1;
    const FAST = 2;

    /**
     * The children of the class must implement this method
     * 
     * Sometimes this method can be public to get "raw" object
     * 
     * @param string $type a generic type
     * 
     * @return VehicleInterface a new vehicle
     */
    abstract protected function createVehicle($type);

    /**
     * Creates a new vehicle
     * 
     * @param int $type
     * 
     * @return VehicleInterface a new vehicle
     */
    public function create($type)
    {
        $obj = $this->createVehicle($type);
        $obj->setColor("#f00");

        return $obj;
    }
}