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`

### 

<?phpnamespace 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>