大家帮忙看看，提示语法错误，小弟新手，

大神们谢谢了！！！源码是    {
        $number = 0;
        $amount = 0;
    }
    $GLOBALS['smarty']->assign('str',sprintf($GLOBALS['_LANG']['cart_info'], $number, price_format($amount, false)));
        $GLOBALS['smarty']->assign('goods',$arr);
        $GLOBALS['smarty']->assign('goods_number',$number);
        $GLOBALS['smarty']->assign('order_amount',$amount);
    $output = $GLOBALS['smarty']->fetch('library/cart_info.lbi');
    return $output;
}

* @access  public
* @param   integer $id     广告位ID
* @param   integer $num    广告数量
* @return  string
*/
function insert_ads($arr)