How to send a file to the server and receive it by the server?

Question

PHP

I have a tutorial site that I'm experimenting with. It is located on a free hosting, ie. The server is not local, but remote.
The task is as follows:
You need to send a file to the server using Qt and C ++, and then accept this file on the server using PHP.
I don't even know how to do it -_-
I doubt that someone can give a specific example of sending and receiving a file (although he really wants to XD ), so just ask, indicate in which direction to dig. I more or less understand how to send, but how to receive? In PHP, a full kettle (((

Answer 1

provided that before accepting everything that is required for processing php is configured and if the question is specifically in the code, then I send: $_FILES
i.e. you have a request with a file coming to php, the files in the request are in the $_FILES variable, you check for emptiness, and then you do what you need, you can google "functions for working with files in php"