function to resize an image

#******************************************************************************
#function to resize an image
#******************************************************************************

function imageResize($w,$h) {
$tw=500;
$th=850;
$x=$w;
$y=$h;
if($w>$tw && $h>$th){
$x=$tw;
$y=$h*$tw/$w;
}
else
{
if($w>$tw && $h<=$th){ $x=$tw; $y=$h-($w-$tw)/$w*$h; } else if($h>$th && $w<=$tw){
$x=$w-($h-$th)/$h*$w;
$y=$th;
}
}
$width = round($x);
$height = round($y);
return "width=\"$width\" height=\"$height\"";
}


#************************************************************************