<?
$pic = $_GET['pic'];
$pic = "userpics/$pic";
$type = explode(".",$pic);
$type = $type[1]; 
$max_height = 100;
$max_width = 100;

$size=GetImageSize($pic);
$width_ratio  = ($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);


Header("Content-Type: image/$type");

if ($type == "jpg")
    {
$src_img = ImageCreateFromJPEG($pic);
     }
if ($type == "gif")
    {
$src_img = ImageCreateFromGIF($pic);
     }	 
$thumb = ImageCreateTrueColor($new_width,$new_height);

ImageCopyResampled($thumb, $src_img, 0,0,0,0,$new_width,$new_height,$size[0],$size[1]);
if ($type == "jpg")
    {
ImageJPEG($thumb);
    }
if ($type == "gif")
    {	
ImageGIF($thumb);
    }	
ImageDestroy($src_img);
ImageDestroy($thumb);
?>