Abstract Factory Design Pattern PHP Example

AbstractFactory.php

<?php

interface CarInterface
{
    public function getBrand(): string;
    public function getPrice(): int;
}

interface MotorcycleInterface
{
    public function getBrand(): string;
    public function getPrice(): int;
    public function getType(): string;
}

class BmwCar implements CarInterface
{
    public function getBrand(): string
    {
        return 'BMW';
    }

    public function getPrice(): int
    {
        return 1;
    }
}

class AudiCar implements CarInterface
{
    public function getBrand(): string
    {
        return 'Audi';
    }

    public function getPrice(): int
    {
        return 2;
    }
}

class BmwMotorcycle implements MotorcycleInterface
{
    public function getBrand(): string
    {
        return 'BMW';
    }

    public function getPrice(): int
    {
        return 3;
    }

    public function getType(): string
    {
        return 'Sport';
    }
}

class AudiMotorcycle implements MotorcycleInterface
{
    public function getBrand(): string
    {
        return 'Audi';
    }

    public function getPrice(): int
    {
        return 4;
    }

    public function getType(): string
    {
        return 'Sport';
    }
}

interface AbstractFactoryInterface
{
    public function createCar(): CarInterface;
    public function createMotorcycle(): MotorcycleInterface;
}

class AudiFactory implements AbstractFactoryInterface
{
    public function createCar(): CarInterface
    {
        return new AudiCar();
    }

    public function createMotorcycle(): MotorcycleInterface
    {
        return new AudiMotorcycle();
    }
}

class BmwFactory implements AbstractFactoryInterface
{
    public function createCar(): CarInterface
    {
        return new BmwCar();
    }

    public function createMotorcycle(): MotorcycleInterface
    {
        return new BmwMotorcycle();
    }
}

$bmwFactory = new BmwFactory();
$bmwCar = $bmwFactory->createCar();
$bmwMotorcycle = $bmwFactory->createMotorcycle();

echo $bmwCar->getBrand() . ' ' . $bmwCar->getPrice() . PHP_EOL;
echo $bmwMotorcycle->getBrand() . ' ' . $bmwMotorcycle->getPrice() . ' ' . $bmwMotorcycle->getType() . PHP_EOL;