public function update(Category $category)
 {
     if ($this->find($category->getId())) {
         $catId = $category->getId();
         $userId = $category->getUser()->getId();
         $superCat = $category->getParentCategory()->getId();
         $subCat = $category->getSubCategory();
         $sql = "UPDATE " . $this->TABLE_NAME . " SET\n                    userId='{$userId}',superCategory='{$superCat}',subCategory='{$subCat}'\n                    WHERE id='{$catId}'";
         if (mysql_query($sql, $this->connection)) {
             return true;
         } else {
             return false;
         }
     } else {
         return false;
     }
 }
    public function feedNews($url, $min, $max)
    {
        if (!($news = $this->getNews('', $min, $max))) {
            return false;
        }
        $feed = '<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<atom:link href="' . $url . '" rel="self" type="application/rss+xml" />
<title>' . $this->config[0]->nomesito . '</title>
<description>' . $this->config[0]->description . '</description>
<link>' . $this->config[0]->url_index . '/index.php</link>';
        foreach ($news as $v) {
            list($d, $m, $y) = explode('-', $v->data);
            list($h, $mn, $s) = explode(':', $v->ora);
            $nickname = parent::getUser($v->autore);
            $feed .= "\n\t<item>\n\t\t<title>" . parent::xmlentities(htmlentities($v->titolo)) . "</title>\n\t\t<description>" . parent::xmlentities(htmlentities($v->contenuto)) . "</description>\n\t\t<author>" . parent::xmlentities(htmlentities($nickname[0]->email)) . '(' . parent::xmlentities(htmlentities($v->autore)) . ")</author>\n\t\t<category>" . parent::xmlentities(htmlentities($v->categoria)) . "</category>\n\t\t<pubDate>" . str_replace('+0000', '+0200', date('r', mktime($h, $mn, $s, $m, $d, $y))) . "</pubDate>\n\t\t<link>{$this->config[0]->url_index}/news/{$v->minititolo}.html</link>\n\t\t<comments>{$this->config[0]->url_index}/news/{$v->minititolo}.html</comments>\n\t\t<guid>{$this->config[0]->url_index}/news/{$v->minititolo}.html</guid>\n\t</item>";
        }
        $feed .= '
</channel>
</rss>';
        return $feed;
    }