Have you ever looked at the
ove_uploaded_file[
^] manual page? I think you haven't. Because that one is for something else. See: upload
ed. It is for moving files uploaded on php side from it's temporary location to it's persistent location on the same side as the php code runs. Of course, it can by a remote location, but only if that one is mounted locally.
So, you won't be able to upload that file to a server via http, even a file system that is exposing itself via http and you could access it from windows explorer - simply because it is out of scope of php, and probably of the web server service itself too (this stands for Linux too, not only for windows).
So if the url you specified is actually a local path on the server, try to specify a local folder path instead of a virtual path that you see from client side. If it is a location remote to the server running the php script, you will need other means to copy the file there.