phpcms二次开发操作数据库

<?php
class MY_index extends index{
function __construct() {
parent::__construct();
$this->db = pc_base::load_model('content_model');

}

public function test() {
$test="test";
$sql="select titlefrom v9_news";
$test=$this->db->query($sql);
$Result = $this->db->fetch_array();

var_dump($Result);
include template('content','test',$default_style);
}
}

?>
//模板文件test.html输出代码
{loop $Result $key $v}
{$v[title]}<br>
{/loop}