How to apply swoole's timer

swoole provides a JavaScript-like setInterval/setTimeout asynchronous high-precision timer with millisecond-level granularity. It's also very simple to use.

# SWOOLE provides a regular device for usage (Recommended learning: Swoole Video Tutorial ) ## r

This is how I used it. Take a look at the code.

$server->tick(1000, function() use ($server, $fd) {        
    $server->send($fd, "hello world");
    });

When I started using the timer, I put it in onWorkStart for execution. In this way, I can ensure that the timer can run normally in the case of a single worker process. , but for swoole, letting it work in a single process obviously insulted its "talent", so I set work_num to 2, and then an accident happened, as shown in the figure

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