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PHP评论回复解决方法

Mar 27, 2017 pm 04:18 PM
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问题:

我知道这个问题非常非常初级。。我也搜索了很多帖子,但是都相当麻烦,或者我能力不够无法实现。
问题是这样的:
我在练习写博客系统,要实现评论回复功能,要求不高,访客评论,博主回复评论,不能对回复再回复,只有一层关系:评论-回复。就这么简单。
网上的方法的数据表结构大多如下:

id:评论id
pid:回复的评论id
content:评论内容

我想知道,当评论的记录与回复的记录之间隔了若干行,要怎样找到回复的记录,比如:

id pid
1  0
2  0
3  1  //回复与评论隔了若干行
4  0

这个问题在SQL排序重组里好难解决啊。。求助大神,万分感谢
解决方案:
固定层级为两层好说
这语句是跟mysql版主学的

select * from `comment` order by if(pid=0,id,pid) asc

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