PHP跨平台开发的学习资源与技术文献推荐

<?php
// 导入必要的库
use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

//定义消息组件类
class Chat implements MessageComponentInterface {
    protected $clients;

    public function __construct() {
        $this->clients = new SplObjectStorage;
    }

    public function onOpen(ConnectionInterface $conn) {
        // 新客户端连接时触发
        $this->clients->attach($conn);
    }

    public function onMessage(ConnectionInterface $from, $msg) {
        // 接收到客户机消息时触发
        foreach ($this->clients as $client) {
            if ($from != $client) {
                // 将消息转发给所有其他客户端
                $client->send($msg);
            }
        }
    }

    public function onClose(ConnectionInterface $conn) {
        // 客户端断开连接时触发
        $this->clients->detach($conn);
    }

    public function onError(ConnectionInterface $conn, \Exception $e) {
        // 发生错误时触发
        $conn->close();
    }
}
?>