<?
$img_name = $_GET['pic'];
$max_width    = $_GET['wd']; // maximum x aperture  in pixels
$max_height   = $_GET['ht']; // maximum y aperture in pixels

$picinfo = getimagesize($img_name);
$type = $picinfo[2];


$size= getimagesize($img_name);
$width_ratio  = ($size[0] / $max_width);
$height_ratio = ($size[1] / $max_height);
 
if($width_ratio >=$height_ratio) 
{
   $ratio = $width_ratio;
}
else
{
   $ratio = $height_ratio;
}
 
$new_width    = ($size[0] / $ratio);
$new_height   = ($size[1] / $ratio);

if ($type ==2) {
   $create='imagecreatefromjpeg';
   $outImage='imagejpeg';
      $type = 'image/jpeg';

}

if ($type ==3) {
   $create='imagecreatefrompng';
   $outImage='imagepng';
   $type = 'image/png';

}

if ($type ==1) {
   $create='imagecreatefromgif';
   $outImage='imagegif';
   $type = 'image/gif';
}


header("Content-Type: $type");
$src_img = $create($img_name);
$thumb = imagecreatetruecolor($new_width,$new_height);
imagecopyresampled($thumb, $src_img, 0,0,0,0,$new_width,$new_height,$size[0],$size[1]);
$outImage($thumb);
imagedestroy($src_img);
imagedestroy($thumb);
?>