How to copy a file from one directory to another using PHP

http://stackoverflow.com/questions/5772769/how-to-copy-a-file-from-one-directory-to-another-using-php

You could use the copy() function :

// Will copy foo/test.php to bar/test.php
// overwritting it if necessary
copy('foo/test.php', 'bar/test.php');

Quoting a couple of relevant sentences from its manual page :

Makes a copy of the file source to dest.

If the destination file already exists, it will be overwritten.