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回调函数有没有更通俗的讲解？还是不太懂啥意思
Is there a more popular explanation of the callback function? -PHP Chinese website Q&A-Is there a more popular explanation of the callback function? -PHP Chinese website Q&A
Let’s take a look and learn.
既然你想通俗易懂，那就比喻一下。你到一个商店买东西，刚好你要的东西没有货，于是你在店员那里留下了你的电话，过了几天店里有货了，店员就打了你的电话，然后你接到电话后就到店里去取了货。在这个例子里，你的电话号码就叫回调函数，你把电话留给店员就叫登记回调函数，店里后来有货了叫做触发了回调关联的事件，店员给你打电话叫做调用回调函数，你到店里去取货叫做响应回调事件。
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Is there a more popular explanation of the callback function? -PHP Chinese website Q&A-Is there a more popular explanation of the callback function? -PHP Chinese website Q&A
Let’s take a look and learn.
既然你想通俗易懂，那就比喻一下。你到一个商店买东西，刚好你要的东西没有货，于是你在店员那里留下了你的电话，过了几天店里有货了，店员就打了你的电话，然后你接到电话后就到店里去取了货。在这个例子里，你的电话号码就叫回调函数，你把电话留给店员就叫登记回调函数，店里后来有货了叫做触发了回调关联的事件，店员给你打电话叫做调用回调函数，你到店里去取货叫做响应回调事件。