php实现毫秒级定时器

 onWorkerStart = function (Worker $worker) {
   Timer::add(2,function(){
       echo time();
    },[],true);

};
$worker->count = 1;
Worker::$logFile = __DIR__ . '/workerman.log';
Worker::$pidFile = __DIR__ . "/" . str_replace('/', '_', __FILE__) . ".pid";
// 运行所有服务
Worker::runAll();
/**
https://gitee.com/FEIGE/swoole-worker
*/