CodeIgniter集成smarty的方法详解

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
require "Smarty-2.6.20/libs/Smarty.class.php";
/**
* @file system/application/libraries/Mysmarty.php
*/
class Mysmarty extends Smarty
{
  function Mysmarty()
  {
    $this->Smarty();
    $config =& get_config();
    // absolute path prevents "template not found" errors
    $this->template_dir = (!empty($config['smarty_template_dir']) ? $config['smarty_template_dir'] : BASEPATH . 'application/views/');
    $this->compile_dir = (!empty($config['smarty_compile_dir']) ? $config['smarty_compile_dir'] : BASEPATH . 'cache/'); 
    //use CI's cache folder
    if (function_exists('site_url')) {
      // URL helper required
      $this->assign("site_url", site_url()); // so we can get the full path to CI easily
    }
  }
  /**
  * @param $resource_name string
  * @param $params array holds params that will be passed to the template
  * @desc loads the template
  */
  function view($resource_name, $params = array())  {
    if (strpos($resource_name, '.') === false) {
      $resource_name .= '.html';
    }
    if (is_array($params) && count($params)) {
      foreach ($params as $key => $value) {
        $this->assign($key, $value);
      }
    }
    // check if the template file exists.
    if (!is_file($this->template_dir . $resource_name)) {
      show_error("template: [$resource_name] cannot be found.");
    }
    return parent::display($resource_name);
  }
} // END class smarty_library
?>

$autoload['libraries'] = array('database', 'mysmarty');

$this->load->library("mysmarty");

$this->mysmarty->assign('test', 'Hello World.');
$this->mysmarty->view('smarty');

$this->load->helper('url');

base_url()."images/xxx.jpg"