if ( isset( $_REQUEST['image'] ) && file_exists( $_REQUEST['image'] ) ) {
header( "Content-type: image/gif" );
$image = $_REQUEST['image'];
passthru( "giftopnm $image |
pnmscale -xscale .5 -yscale .5 |
ppmquant 256 | ppmtogif" );
} else {
print "The image ".$_REQUEST['image']." could not be found";
}
?>