PHP抽象工场模式

/**
 * Interface AbstractFactory 抽象工场模式
 */
//抽象工场
interface AbstractFactory{
    //创建等级结构工场方法
    public function createProductA();
    public function createProductB();
}

//具体工场1
class ConcreteFactory1 implements AbstractFactory {
    public function createProductA()
    {
        // TODO: Implement createProductA() method.
        return new ProductA1();
    }
    public function createProductB()
    {
        // TODO: Implement createProductB() method.
        return new ProductB1();
    }
}

//具体工场2

class ConcreteFactory2 implements AbstractFactory {
    public function createProductA()
    {
        // TODO: Implement createProductA() method.
        return new ProductA2();
    }
    public function createProductB()
    {
        // TODO: Implement createProductB() method.
        return new ProductB2();
    }
}

//抽象产品A
interface AbstractProductA{
    public function price();
}
//抽象产品B
interface AbstractProductB{
    public function price();
}


//具体产品A1
class ProductA1 implements AbstractProductA{
    public function price()
    {
        // TODO: Implement price() method.
        echo 'ProductA1 价格';
    }
}

//具体产品A2
class ProductA2 implements AbstractProductA{
    public function price()
    {
        // TODO: Implement price() method.
        echo 'ProductA2 价格';
    }
}

//具体产品B1
class ProductB1 implements AbstractProductB{
    public function price()
    {
        // TODO: Implement price() method.
        echo 'ProductB1 价格';
    }
}

//具体产品B1
class ProductB2 implements AbstractProductB{
    public function price()
    {
        // TODO: Implement price() method.
        echo 'ProductB2 价格';
    }
}

class Client {
    public static function main() {
        self::run(new ConcreteFactory1());
        self::run(new ConcreteFactory2());
    }

    public static function run(AbstractFactory $factory) {
        $productA = $factory->createProductA();
        $productB = $factory->createProductB();
        echo $productA->price(),PHP_EOL;
        echo $productB->price(),PHP_EOL;
    }
}

Client::main();