Question

How to make a copy of a text file that located in another server , in php

Answer 1

There are two ways that I can immediately think of:

file_put_contents('/my/path/file.txt', file_get_contents('http://www.example.org/test.txt'));

See the file_get_contents() and file_put_contents() manual pages.

Or more succinctly:

copy('http://www.example.org/test.txt', '/my/path/file.txt')

See the copy() manual page.

Of course do not forget:

A URL can be used as a filename with this function if the fopen
wrappers have been enabled.

See the allow_url_fopen manual page for more information.