function picture($off_site,$savethumb,$gen) {
               
        $fp = fopen($off_site, 'rb') or die($off_site.' konumunda dosya açılamadı.');
        $buf = '';
        while(!feof($fp))
        {
                $buf .= fgets($fp, 4096);
        }
        fclose($fp);
        $data = $buf;
        //yeni boyutlandırma
        $size = $gen;

        $src = imagecreatefromstring($data);
        $width = imagesx($src);
        $height = imagesy($src);
        $aspect_ratio = $width/$height;
        //ölçeklendirme
        if($width <= $size)
        {
                $new_w = $width;
                $new_h = $height;
        }else{
                $new_w = $size;
                $new_h = abs($new_w / $aspect_ratio);
        }

        $img = imagecreatetruecolor($new_w,$new_h);
       
        //çıktı
        imagecopyresampled($img,$src,0,0,0,0,$new_w,$new_h,$width,$height);
        // header
        //if(empty($savethumb)) header('Content-Type: image/jpeg');
        // ya da kaydedin
        imagejpeg($img, $savethumb, 90);
        imagedestroy($img);    

}