[Antimated]

well I made this function to scale proportional, it uses a given width, height, and optionally the max width/height u want (depends on the given width and height)
(also posted this on stackoverflow in case you guys blame me of stealing code..)

PHP Code:

   function scaleProportional($img_w,$img_h,$max=50)

   {

       $w = 0;

       $h = 0;



       $img_w > $img_h ? $w = $img_w / $img_h : $w = 1;

       $img_h > $img_w ? $h = $img_h / $img_w : $h = 1;



       $ws = $w > $h ? $ws = ($w / $w) * $max : $ws = (1 / $h) * $max;

       $hs = $h > $w ? $hs = ($h / $h) * $max : $hs = (1 / $w) * $max;



       return array(

           'width'=>$ws,

           'height'=>$hs

       );

   } 

usage:

PHP Code:

 $getScale = scaleProportional(600,200,500);

 $targ_w = $getScale['width']; //returns 500

  $targ_h = $getScale['height']; //returns 16,6666667 

then you just gotta use the $targ_w and $targ_h