PHP で責任連鎖パターンを使用するにはどうすればよいですか?

interface Handler {
    public function handle(Request $request);
}

class ConcreteHandler1 implements Handler {
    public function handle(Request $request) {
        if ($request->type == 'type1') {
            // 处理请求
            return true;
        } else {
            // 将请求传递给下一个处理程序
            return $this->next->handle($request);
        }
    }
}

class ConcreteHandler2 implements Handler {
    public function handle(Request $request) {
        if ($request->type == 'type2') {
            // 处理请求
            return true;
        } else {
            // 请求不能被处理
            return false;
        }
    }
}

class Client {
    private $handlers;

    public function __construct() {
        $this->handlers = [
            new ConcreteHandler1(),
            new ConcreteHandler2()
        ];
    }

    public function handle(Request $request) {
        foreach ($this->handlers as $handler) {
            if ($handler->handle($request)) {
                break;
            }
        }
    }
}

$request = new Request('type1');
$client = new Client();
$client->handle($request); // 请求被成功处理