php的代理模式

举例，我想去买一张碟片
 

class client

{
        public static function shoping($goods)

        {
            $poroxy = new proxy;
            $poroxy ->buy($goods);

        }

}

client::shoping("去英国给我买张CD");

//CD代理

class proxy implements shop
{
    public function buy($title)
    {
        $this->go();
        $CDshop = new CDshop;
        $CDshop->buy($title);
    }
    public function go()
    {
        echo "跑去美国代购".PHP_EOL;
    }
}

代理抽象接口

interface shop
{
    public function buy($title);
}

跑去了CDshop店里面

class CDshop implements shop
{
    public function buy($title)
    {
        echo "购买成功，这是你的《{$title}》唱片".PHP_EOL;
    }
}