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.

You could use the rename() function :

rename('foo/test.php', 'bar/test.php');

This however will move the file not copy

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