If you are using PHP >= 7.1 then DO NOT use `declare(ticks=1)` instead use `pcntl_async_signals(true)`

There's no performance hit or overhead with `pcntl_async_signals()`. See this blog post https://blog.pascal-martin.fr/post/php71-en-other-new-things.html for a simple example of how to use this.