swoole如何在启动时添加任务

$server = new Swoole\WebSocket\Server("0.0.0.0", 9501);



$server->on('open', function (Swoole\WebSocket\Server $server, $request) {

    echo "server: handshake success with fd{$request->fd}\n";

});

//心跳等配置

$server->set([

    'heartbeat_check_interval' => 5,

    'heartbeat_idle_time' => 10,

]);



$server->on('message', function (Swoole\WebSocket\Server $server, $frame) {

    echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}\n";

    $server->push($frame->fd, "this is server");

});



$server->on('close', function ($ser, $fd) {

    echo "client {$fd} closed\n";

});



//我想加一个类似心跳检测的功能，就是启动后就轮询执行的功能 我要怎么加呢？

$server->start();