Smarty::setPluginsDir PHP Method

    public function setPluginsDir($plugins_dir)
    {
        $this->plugins_dir = array();
        foreach ((array) $plugins_dir as $k => $v) {
            $this->plugins_dir[$k] = rtrim($v, '/\\') . DS;
        }
        return $this;
    }

 /**
  * 构造方法
  *
  * @return void
  */
 protected function __construct()
 {
     \Yaf_Loader::import(APP_PATH . 'library/Thirdpart/Smarty/libs/Smarty.class.php');
     $this->_smarty = new \Smarty();
     $this->_smarty->setTemplateDir('');
     $this->_smarty->setCompileDir(TMP_PATH . 'smarty-compile/');
     $this->_smarty->setCacheDir(TMP_PATH . 'smarty-cache/');
     $this->_smarty->setPluginsDir(APP_PATH . 'library/Smarty/Plugins/');
     $this->_smarty->left_delimiter = '<!--{';
     $this->_smarty->right_delimiter = '}-->';
     $this->_smarty->enableSecurity('Comm\\Smarty_Security_Policy');
 }