/*更新商品的某个字段*/function update_goods($goods_id, $field, $value){    if ($goods_id)    {        /* 清除缓存 */        clear_cache_files();        $sql = "UPDATE " . $GLOBALS[‘ecs‘]->table(‘goods‘) .                " SET $field = ‘$value‘ , last_update = ‘". gmtime() ."‘ " .                "WHERE goods_id " . db_create_in($goods_id);        return $GLOBALS[‘db‘]->query($sql);    }    else    {        return false;    }}function message($msg, $url = NULL, $type = ‘succeed‘, $waitSecond = 2) {        if ($url == NULL)            $url = ‘javascript:history.back();‘;        if ($type == ‘error‘) {            $title = ‘错误信息‘;        } else {            $title = ‘提示信息‘;        }        $data [‘title‘] = $title;        $data [‘message‘] = $msg;        $data [‘type‘] = $type;        $data [‘url‘] = $url;        $data [‘second‘] = $waitSecond;        $this->assign(‘data‘, $data);        $this->display(‘message‘);        exit();    }    // 弹出信息function alert($msg, $url = NULL, $parent = false) {        header("Content-type: text/html; charset=utf-8");        $alert_msg = "alert(‘$msg‘);";        if (empty($url)) {            $gourl = ‘history.go(-1);‘;        } else {            $gourl = ($parent ? ‘parent‘ : ‘window‘) . ".location.href = http://www.mamicode.com/‘{$url}‘";        }        echo "<script>$alert_msg $gourl</script>";        exit();    }