Update: The content in this post maybe out of date or inaccurate.

Hello and sorry for my English.

My Problem.
i have a webpage with this script php plus advanced short url script.
I have generate a secret kex. but i have no thumbs on my site. I have found this php file for generate the thumb. Here the code from the file:

<?php

if(!defined('ANTI_DIRECT')) exit(header('location: ../'));

function domainThumb($domain,$size='sm') {

        global $_config;

        if($_config['thumbKey']) {
                $failed = 'upload/domainThumbs/_failed.'.$domain.'.jpg';

                if(is_file($failed)) $timeout = time() - filemtime($failed);

                if(!is_file($failed) || $timeout > 1*24*60*60) {
                        $request_url =  "http://images.shrinktheweb.com/xino.php?"
                                        . "Service=".           "ShrinkWebUrlThumbnail"
                                        . "&Action=".           "Thumbnail"
                                        . "&stwaccesskeyid=".   $_config['thumbKey']
                                        . "&stwsize=" .            $size
                                        . "&stwu=" .               $_config['thumbSecretKey']
                                        . "&stwurl=http://www.rhwm.eu" .      $domain;

                        $line = implode(file($request_url));
                        $num_matches = preg_match('/<[^:]*:Thumbnail\\s*(?:Exists=\"((?:true)|(?:false))\")?[^>]*>([^<]*)<\//', $line, $matches);
                        if($num_matches == 1) {
                                $thumbnail = $matches[2];
                                $imagedata = @imagecreatefromjpeg($thumbnail);
                                if($imagedata != '') {
                                        imagejpeg($imagedata,'upload/domainThumbs/'.$domain.'.jpg',90);
                                        if(is_file($failed)) unlink($failed);
                                        return true;
                                } else {
                                        copy('env/pix/pixel.gif',$failed);
                                }
                        }
                }
        }
        return false;
}

?>

I can not find the problem. Please cam you help me ?

Rainer