The code in the article comes from the example of this page http://www.php.net/manual/en/function.uniqid.php http://www.php.net/manual/en/function.uniqid.php wh

The code in the article comes from the example of this page http://www.php.net/manual/en/function.uniqid.php http://www.php.net/manual/en/function.uniqid.php which has an interesting comments section on unique ids.