如何通过PHP面向对象简单工厂模式实现对象的动态创建

// 商品类
class Product
{
    private $name;
    private $price;

    public function __construct($name, $price)
    {
        $this->name = $name;
        $this->price = $price;
    }

    public function getName()
    {
        return $this->name;
    }

    public function getPrice()
    {
        return $this->price;
    }
}

// 工厂类
class ProductFactory
{
    public static function createProduct($type)
    {
        switch ($type) {
            case 'book':
                return new Product('Book', 29.99);
            case 'phone':
                return new Product('Phone', 499.99);
            case 'laptop':
                return new Product('Laptop', 999.99);
            default:
                throw new Exception('Unsupported product type: ' . $type);
        }
    }
}

// 使用工厂类创建商品对象
$book = ProductFactory::createProduct('book');
$phone = ProductFactory::createProduct('phone');
$laptop = ProductFactory::createProduct('laptop');

echo $book->getName();  // 输出：Book
echo $book->getPrice(); // 输出：29.99

echo $phone->getName();  // 输出：Phone
echo $phone->getPrice(); // 输出：499.99

echo $laptop->getName();  // 输出：Laptop
echo $laptop->getPrice(); // 输出：999.99