棘轮棘轮\ Http \ HttpServer类并不存在

Question

我找不到Ratchet \ Http \ HttpServer类。每次运行以下代码时都会产生错误。

require __DIR__ . '/../vendor/autoload.php';
use Ratchet\Server\IoServer;
use Ratchet\Http\HttpServer;
use Ratchet\WebSocket\WsServer;
use Game\Load;
$server = IoServer::factory(new HttpServer(new WsServer(new Load())), 2000);
$server->run();

Class＆＃39; Ratchet \ Http \ HttpServer＆＃39;找不到