Codeigniter中集成smarty和adodb的方法

<?php
// load Smarty library
require('Smarty/Smarty.class.php');
// The setup.php file is a good place to load
// required application library files, and you
// can do that right here. An example:
// require('guestbook/guestbook.lib.php');
class MySmarty extends Smarty {
 function MySmarty()
 {
    // Class Constructor.
    // These automatically get set with each new instance.
    $this->Smarty();
    $basedir=dirname(__FILE__);
    $this->template_dir = "$basedir/templates/";
    $this->compile_dir = "$basedir/templates_c/";
    $this->config_dir  = "$basedir/configs/";
    $this->cache_dir  = "$basedir/cache/";
    //$this->compile_check = true;
    //this is handy for development and debugging;never be used in a production environment.
    //$smarty->force_compile=true;
    $this->debugging = false;
    $this->cache_lifetime=30;
    $this->caching = 0; // lifetime is per cache
    //$this->assign('app_name', 'Guest Book');
 }
}
?>

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class Adodb
{
  function Adodb()
  {
    //$dsn="dbdriver://username:password@server/database"
    $dsn = 'mysql://user:password@localhost/xxxx';
    require_once("adodb/adodb.inc".EXT);
    $this->adodb =& ADONewConnection($dsn);
    $this->adodb->Execute("set NAMES 'utf8'"); 
  }
}
?>

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
$obj =& get_instance();
$obj->adodb = new Adodb($obj);
$obj->ci_is_loaded[] = 'adodb';

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
if ( ! class_exists('MySmarty'))
{
  require_once(APPPATH.'libraries/mysmarty'.EXT);
}
$obj =& get_instance();
$obj->mysmarty = new MySmarty();
$obj->ci_is_loaded[] = 'mysmarty';
?>

<?php
class Test extends Controller {
 function Test()
 {
  parent::Controller(); 
  $this->load->library('mysmarty');
  $this->load->library('adodb');
 }
 function index()
 {
 $this->load->library('adodb');
 $row = $this->adodb->adodb->getrow('SELECT * FROM admin');
    $this->mysmarty->assign("row",$row);
    $this->mysmarty->display("test.tpl");
 }
}
?>