php框架在物联网中的优势与挑战

<?php
use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

class IoTServerSocket implements MessageComponentInterface
{
    protected $connections;

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

    public function onOpen(ConnectionInterface $conn)
    {
        // 新连接已打开
        $this->connections->attach($conn);
    }

    public function onMessage(ConnectionInterface $from, $msg)
    {
        // 从已连接客户端接收消息
        foreach ($this->connections as $connection) {
            if ($connection !== $from) {
                // 将消息转发给所有其他已连接客户端
                $connection->send($msg);
            }
        }
    }

    public function onClose(ConnectionInterface $conn)
    {
        // 已连接客户端已关闭
        $this->connections->detach($conn);
    }

    public function onError(ConnectionInterface $conn, \Exception $e)
    {
        // 处理连接错误
        $this->connections->detach($conn);
    }
}