[PHP知识库]Thinkphp6+Workerman消息推送

业务需求示例：系统后台监听有新的商品订单，新消息等的通知，推送给所有登陆系统的用户。

逻辑：使用websocket建立连接，并设置定时器发送心跳保持连接不被断开。建立连接后，php端需要设置心跳时间，判断mysql业务表是否有新记录或者订单，如果有就推送消息给所有登陆系统用户，并更新该记录已推送。

### 1.composer先安装workerman组件

composer require topthink/think-worker`

### 2.配置

- worker配置 `config/worker_server.php`

// 扩展自身需要的配置

'protocol'???????=> 'websocket', // 协议 支持 tcp udp unix http websocket text
'host'???????????=> '0.0.0.0', // 监听地址
'port'???????????=> 2346, // 监听端口
'socket'?????????=> '', // 完整监听地址
'context'????????=> [], // socket 上下文选项
'worker_class'???=> 'app\work\Push', // 自定义Workerman服务类名 支持数组定义多个服务

- worker实现 `app/work/Push.php`

###?

<?php
namespace app\work;
use think\worker\Server;
use Workerman\Lib\Timer;
use think\facade\Db;
class Push extends Server
{
    protected $socket = 'http://0.0.0.0:2346';   //端口自行修改

    protected static $heartbeat_time    =   55;

    public function onWorkerStart($worker){
        //查看是否有新的充值或提现订单，有就推送给所有用户
        Timer::add(3, function()use($worker){

            $time_now   =   time();
            $hasNewDepositOrder   =   Db::name('deposit_order')->where('order_status',0)->where('is_push',0)->order('id desc')->count('id');
            $system_listener    =   Db::name('system_listener')->cache(true)->order('id desc')->select()->toArray();

            if($hasNewDepositOrder){
                $depositOrderInfo   =   Db::name('deposit_order')->where('order_status',0)->where('is_push',0)->order('id desc')->find();
                $data   =   ['creatTime'=>$depositOrderInfo['create_time'],'money'=>$depositOrderInfo['pay_amount'],'type'=>'deposit','system_listener'=>$system_listener];
                foreach($worker->connections as $connection) {
                    if(empty($connection->lastMessageTime)){
                        $connection->lastMessageTime =   $time_now;
                    }

                    if($time_now-$connection->lastMessageTime > self::$heartbeat_time){
                        $connection->close();
                    }

                    $connection->send(json_encode($data));
                }

               Db::name('deposit_order')->where('id',$depositOrderInfo['id'])->save(['is_push'=>1]);
            }else{
                foreach($worker->connections as $connection) {
                    if(empty($connection->lastMessageTime)){
                        $connection->lastMessageTime = $time_now;
                        continue;
                    }

                    if($time_now-$connection->lastMessageTime > self::$heartbeat_time){      //连接超时
                        $connection->close();
                    }
                }
            }
        });
    }

### 运行

`php think worker:server` reload|restart|stop|status

### ?websokcet实现?

<script>
let ws = new WebSocket("ws://127.0.0.1:2346")

ws.onopen = function() {??//绑定连接事件
????console.log("连接成功");
????//每30秒发送一次心跳
????setInterval(function(){
????????ws.send(JSON.stringify({'type':"peng"}));
????????console.log('发送心跳...');

????},30000)

};

ws.onmessage = function(evt) {//绑定收到消息事件
????data = JSON.parse(evt.data)
????console.log(data);
????//这里处理收到的消息, type类型有两种: connectin、deposit如果有deposit要提示有新的订单

};


ws.onclose = function(evt) { //绑定关闭或断开连接事件
　　console.log("连接已关闭");
};
</script>