PHP で簡単なファクトリ パターンを適用してオブジェクトの自動作成を実現する方法

interface ProductInterface
{
    public function getInfo();
    public function getPrice();
}

class Phone implements ProductInterface
{
    private $brand;
    private $model;
    private $price;
    
    public function __construct($brand, $model, $price)
    {
        $this->brand = $brand;
        $this->model = $model;
        $this->price = $price;
    }
    
    public function getInfo()
    {
        return "手机品牌：{$this->brand}，型号：{$this->model}";
    }
    
    public function getPrice()
    {
        return $this->price;
    }
}

class TV implements ProductInterface
{
    private $brand;
    private $model;
    private $price;
    
    public function __construct($brand, $model, $price)
    {
        $this->brand = $brand;
        $this->model = $model;
        $this->price = $price;
    }
    
    public function getInfo()
    {
        return "电视品牌：{$this->brand}，型号：{$this->model}";
    }
    
    public function getPrice()
    {
        return $this->price;
    }
}

class ProductFactory
{
    public static function create($type, $brand, $model, $price)
    {
        switch ($type) {
            case 'phone':
                return new Phone($brand, $model, $price);
                break;
            case 'tv':
                return new TV($brand, $model, $price);
                break;
            default:
                throw new Exception("不支持的产品类型：{$type}");
        }
    }
}

$phone = ProductFactory::create('phone', 'iPhone', '11 Pro', 6999);
$tv = ProductFactory::create('tv', 'Sony', 'Bravia', 5999);

echo $phone->getInfo();  // 输出：手机品牌：iPhone，型号：11 Pro
echo $tv->getInfo();  // 输出：电视品牌：Sony，型号：Bravia

echo $phone->getPrice();  // 输出：6999
echo $tv->getPrice();  // 输出：5999