Gd library question "dynamic images"

[mind-owner]

well this is my .htacces fileRewriteEngine OnRewriteRule ^(.*)/(.*).png index.png?bg=$1&text=$2RewriteRule index.png index.phpI only have 6 bgs "pictures" so if some one will put "?bg=7" the gd library script will show a error "didn't find the picture"How could I With a php script redirect the page to another one if picture "bg" not found?

[MrAdam]

not sure if this is what your after but something like..

if ($_GET['bg']>6) header("Location: errorpage.php");

or perhaps..

if (!file_exists("path/".$_GET['bg'].".png") header("Location: errorpage.php");