//文件名CelueService.php
//定義接口，衣服下有褲子、鞋子
interface Yifu
{
    public function kuzi();

    public function xiezi();
}
//淘寶褲子、鞋子
class Taobao implements Yifu
{
    public function kuzi()
    {
        echo "toabao---kuzi";
    }

    public function xiezi()
    {
        echo "taobao---xiezi";
    }
}
//京東褲子、鞋子
class Jingdong implements Yifu
{
    public function kuzi()
    {
        echo "jingdong---kuzi";
    }

    public function xiezi()
    {
        echo "jingdong---xiezi";
    }
}

class CelueService
{
    private $obj;

    //方式1：
    public function __construct(Yifu $yifu)
    {
        $this->obj = $yifu;
    }

//    //方式2
//    public function __construct($method)
//    {
//        $temp = new \ReflectionClass($method);
//        $this->obj = $temp->newInstance();
//    }

    public function total_kuzi()
    {
        $this->obj->kuzi();
    }

    public function total_xiezi()
    {
        $this->obj->xiezi();
    }
}

$obj = new CelueService(new Taobao());//需要京東就傳new Jingdong()
$obj->total_xiezi();