Thumbnails on the fly

[mad@Max]

Hi.
I'm trying to create thumbnails on the fly, from this code

PHP Code:

    $mdm_hts = $vbulletin->db->query_read("
            SELECT post.pagetext, thread.threadid, thread.title, thread.forumid
            FROM " . TABLE_PREFIX . "thread AS thread
            LEFT JOIN " . TABLE_PREFIX . "post AS post ON (thread.firstpostid = post.postid)
            WHERE thread.hotthread = '1'
            $mdmhtf
            ORDER BY rand()
            LIMIT $mdm_lim
            ");
    while ($mdm_ht = $vbulletin->db->fetch_array($mdm_hts))
    {
        $mdmimgs = preg_split('#\[' . $mdmtag . '\]|\[\/' . $mdmtag . '\]#si', $mdm_ht[pagetext], -1,
            PREG_SPLIT_DELIM_CAPTURE);
        $mdmimg = $mdmimgs[1];
        $thumbimg = $mdmimg;
        require_once(DIR . '/includes/class_upload.php');
        require_once(DIR . '/includes/class_image.php');

        $upload = new vB_Upload_Image($vbulletin);
        $upload->image =& vB_Image::fetch_library($vbulletin);
        $upload->path = "./hotimg";
        $uploaded_imagefile_path = $upload->process_upload($mdmimg);

        eval('$mdm_ht_bit .= "' . fetch_template('mdm_ht_bit') . '";');
        $htcount++;
    } 


Images for upload gets from url in the post, then uploaded.
But images are not created. What am I doing wrong?
----------
I found this code for creating thumbnails https://vborg.vbsupport.ru/showpost....13&postcount=2, but i don't know how it apply for this.

--------------- Added [DATE]1249500377[/DATE] at [TIME]1249500377[/TIME] ---------------

I made test script

PHP Code:

if ($_REQUEST['do'] == 'mdmimg')
{
    require_once (DIR . '/includes/class_upload.php');
    require_once (DIR . '/includes/class_image.php');

    $imgpath = DIR . '/hotimg/';
    $mdmimg = 'http://img3.immage.de/24073885f.jpg';
    $imgname = preg_replace('/(.*)\/([^\/]*)/', '\\2', $mdmimg);
    $mdmimgpath = $imgpath . $imgname;
    if (!file_exists($mdmimgpath))
    {
        $upload = new vB_Upload_Image($vbulletin);
        $upload->image =& vB_Image::fetch_library($vbulletin);
        $upload->path = $imgpath;
        if (!($upload->process_upload($mdmimg)))
        {
            eval(standard_error(fetch_error('there_were_errors_encountered_with_your_upload_x',
                $upload->fetch_error())));
        } else
        {
            print_output($imgname);
        }

        $image = &vB_Image::fetch_library($vbulletin);

        $thumbnail = $image->fetch_thumbnail($imgname, $mdmimgpath, 200, 200);
        @$file = fopen($mdmimgpath, 'w');
        @fwrite($file, $thumbnail['filedata']);
        @fclose($file);
    } else
    {
        $image = &vB_Image::fetch_library($vbulletin);

        $thumbnail = $image->fetch_thumbnail($imgname, $mdmimgpath, 200, 200);
        @$file = fopen($mdmimgpath, 'w');
        @fwrite($file, $thumbnail['filedata']);
        @fclose($file);
        print_output('file exist!');
    }
} 


File are uploaded, but not create a thumbnail. Thumb will be created only second request. Hmmm... Why?!