note 13733 added to ref.mysql.php

It looks like the reason for the double vision is so that when you want to use the sql results, you can call the array elements via either indices (e.g. $line[0], $line[1], etc.) or by their database field names (e.g. $line["uid"], $line["pw"], $line["gid"], etc.). You can see this by changing the example to print $col_name as well as $col_value. Each repeated val shows up with a different key (of course) each time. http://www.php.net/manual/en/ref.mysql.php