What does this mean if only scientists can understand it?

What does this mean if only scientists can understand it? I recently learned a cms program developed by php and learned it by SB, he said SB because this kid made a few words that only scientists can understand,
He said that this is a hook, a hook, and a hook. I understand that a hook is a Gou lead. it is used only when you get a girl. why is there a gap in php! When I was learning php, the scientists who taught php didn't tell me, is it a mess,

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Baidu understands the event-driven windows system.
There are many dz hooks, which are convenient for secondary development. to put it bluntly, an interface is left for you at a certain stage to see what you want to do.

That is, leave an interface to call other things.

That is, leave an interface to call other things.

Hello, how do I think runhooks (); is that when the program is running here, what does it mean to leave an interface to call other things? The runhooks function is called. The specific content depends on the function definition.

Hook [English] [h? K] [US] [h? K]
N. Hook, iron hook; bending part, Hook part; trap, trap; <strong> anchor;

Runhooks is the execution of things mounted on the hook.
So hooks is the interface between your application and the core system.

Runhooks (); is to call the plug-in. if you delete this sentence, the files under your entry file cannot call the plug-in added to the background.