WorkerMan实现即时通讯（Redis缓存用户信息和聊天记录）

使用redis缓存用户数据和聊天记录 Chat.php

<?php
/**
 * @author <fl140125@gmail.com>
 * Class Chat
 */
class Chat
{
    /**
     * @var Redis $redisClient
     */
    protected $redisClient;
    /**
     * @var string $hashKey
     */
    protected $hashKey = 'unread_';
    /**
     * Chat constructor.
     */
    public function __construct()
    {
        $this->redisClient = new Redis();
        $this->redisClient -> connect('127.0.0.1', 6379);
    }
    /**
     * TODO：缓存用户聊天记录
     * @param $from
     * @param $to
     * @param $room_id
     * @param $message
     * @return bool|int
     */
    public function setChatMsgLists($from, $to, $room_id, $message)
    {
        $value = str_replace('\\', '', json_encode($message, JSON_UNESCAPED_UNICODE));
        $keyName = $to == 'all' ? 'receive_all_'.$room_id : "receive_{$from}_{$to}";
        return $this ->redisClient-> lPush($keyName, $value);
    }
    /**
     * TODO：获取聊天记录
     * @param $from
     * @param $to
     * @param $room_id
     * @param int $page
     * @param int $limit
     * @return array
     */
    public function getChatMsgLists($from, $to, $room_id, $page = 1, $limit = 19)
    {
        $message = array();
        $time = array();
        $offset = $limit * ($page - 1) ;
        //群聊消息
        if (!empty($room_id)) {
            $recName = 'receive_all_'.$room_id;
            $num = $this->getMsgLen($recName);