use ReactEventLoopLoop; use ReactHttpClientClient;  // 创建事件循环 $loop = Loop::get();  // 发送 HTTP 请求 $client = new Client($loop); $client->request('GET', 'http://example.com')->then(function ($response) use ($loop) {     // 响应处理完毕后关闭循环     $loop->stop(); }, function ($e) {     // 出错后关闭循环     $loop->stop(); });  // 运行事件循环 $loop->run();

use RatchetServerIoServer; use RatchetHttpHttpServer; use RatchetWebSocketWsServer;  // Chat 消息处理器 class Chat implements MessageComponentInterface {     // 所有连接的客户端     protected $clients;      public function onOpen(ConnectionInterface $conn)     {         $this->clients[] = $conn;     }      public function onMessage(ConnectionInterface $from, $msg)     {         foreach ($this->clients as $client) {             $client->send($msg);         }     }      public function onClose(ConnectionInterface $conn)     {         // 从客户端集移除连接     }      public function onError(ConnectionInterface $conn, Exception $e)     {         // 出错后关闭连接     } }  // 创建 HTTP 服务器 $http = new HttpServer(new WsServer(new Chat()));  // 创建并运行 IO 服务器 $io = new IoServer($http, 8080); $io->run();