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function spec_price($spec)
{
    if (!empty($spec))
    {
        $where = db_create_in($spec, 'goods_attr_id');  //这里是注入位置，能控制$spec就可以了
        $sql = 'SELECT SUM(attr_price) AS attr_price FROM ' . $GLOBALS['ecs']->table('goods_attr') . " WHERE $where";
        $price = floatval($GLOBALS['db']->getOne($sql));
    }
    else
    {
        $price = 0;
    }
    return $price;
}

/* 处理普通商品或非优惠的配件 */
            else
            {
                $attr_id    = empty($goods['goods_attr_id']) ? array() : explode(',', $goods['goods_attr_id']); //看,$attr_id是读取的购物车商品的goods_attr_id字段，所以只要在添加商品到购物车时写入注入代码就可以了
                $goods_price = get_final_price($goods['goods_id'], $val, true, $attr_id);
                //更新购物车中的商品数量
                $sql = "UPDATE " .$GLOBALS['ecs']->table('cart').
                        " SET goods_number = '$val', goods_price = '$goods_price' WHERE rec_id='$key' AND session_id='" . SESS_ID . "'";
            }