可变参数在 PHP 设计模式中的应用示例

class ProductFactory {
    public static function createProduct(...$Args) {
        $Type = array_shift($Args);
        return new $Type(...$Args);
    }
}

$productA = ProductFactory::createProduct("ProductA", "Arg1", "Arg2");
$productB = ProductFactory::createProduct("ProductB", "Arg3", "Arg4");

class Strategy {
    public static function execute(...$Args) {
        $Strategy = array_shift($Args);
        return $Strategy($Args);
    }
}

$strategyA = function (...$Args) {
    return $Args[0] + $Args[1];
};

$result = Strategy::execute($strategyA, 10, 20);

class ComplexObject {
    private $Properties = [];

    public function __construct(...$Args) {
        foreach ($Args as $Property => $Value) {
            $this->Properties[$Property] = $Value;
        }
    }

    public function getProperty($Property) {
        return $this->Properties[$Property] ?? null;
    }
}

$object = new ComplexObject("Name", "John", "Age", 30);

echo $object->getProperty("Name"); // John

printf("Product %d: %.2f", 1, 20.99); // Product 1: 20.99