In many PHP scripts, I see a header that looks similar to this:

<?php
// $Id: program_name.php,v 1.6 2002/08/10 00:33:38 author Exp $

Is this ID line computer generated, or is it just hand updated each time? I was thinking it was computer generated because of the similarities in many of the scripts I have seen.

If it is computer generated, how does one do that?

It's a CVS variable. CVS has a few variables that will automatically expand upon each check-in of the file.

See http://www.cvshome.org/....6/cvs_12.html#SEC98 for details

--mark