public function feedbackAction()
{
$db = new PlaygroundModel();
$sql = "SELECT * FROM `playground_feedback` order by `id` DESC;";
$ret = $db->fetchArray($sql);
$feedbacks = array();
foreach ($ret as $line) {
$line["feedback"] = urldecode($line["feedback"]);
$line["feedback"] = ToolModel::toHtml($line["feedback"]);
if ($line["createtime"] != 0) {
$line["createtime"] = ToolModel::countTime($line["createtime"]);
} else {
$line["createtime"] = "";
}
$feedbacks[] = $line;
}
$this->_mainContent->assign("feedbacks", $feedbacks);
$this->display();
}