Is the handle a concept that belongs exclusively to the Windows operating system?

Is the handle a concept that is specifically owned by the Windows operating system?
This post was last edited by shopnc_02 on 2014-10-28 12:30:54

Why do you want to ask this question, because PHP seems to use this logic often, so I want to understand the point. Baidu a bit, it seems that the handle is the product under Windows, then other systems such as Linux, Uinx and other operating systems also have this thing? There is also the concept of hook , it seems that the handle is also hook, then hook is how to go? Always feel PHP in a mess.
Also: $_mysqli=new mysqli (' Cocalhost ', ' root ', ' yangfan ', ' cms '); In this sentence, why say $_mysqli is the handle?
I understand it's a variable.
------to solve the idea----------------------
Let's say this:
Resources are real, like you.
A variable is a carrier, or a name. Like your I.D. 's never going to be shopnc_02, but he's representing you.

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