$lost_ids = array_diff($all_ids,$old_ids); //array_diff,$old_ids不可以为null否则返回为null;array_diff起不到效果~~~ 相关文章: 2021-06-15 2021-06-23 2021-12-28 2021-08-08 2022-02-06 2021-05-18 2021-08-08 2022-01-12