Proportional image resize

Question

I\'m having a little bit of a problem scaling my images to a properly predefined size. I was wondering - since it is purely mathematics, if there\'s some sort of common logi

Answer 1

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)

   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:

            $getScale = scaleProportional(600,200,500);
            $targ_w = $getScale['width']; //returns 500
            $targ_h = $getScale['height']; //returns 16,6666667