Flash: Share Game's Score Script

[Mr. Websites]

I'm wondering how the 'challenge' component of this game is created, particularly the type of coding 'mko.php' would entail. I'm certain that this would help a lot of game developers. Could someone possibly create a simple FLA and PHP file to show how a score could be scrambled and unscrambled, so as to allow players the opportunity to challenge their friends? Thanks!