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Asked: 2026-05-11T03:19:00+00:00

Using PHP and MySQL, I have a forum system I’m trying to build. What

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Using PHP and MySQL, I have a forum system I’m trying to build. What I want to know is, how can I set it so that when a user reads a forum entry, it shows as read JUST for that user, no matter what forum they are in, until someone else posts on it.

Currently, for each thread, I have a table with a PostID, and has the UserID that posted it, the ThreadID to link it to, the actual Post (as Text), then the date/time it was posted.

For the thread list in each forum, there is the threadID (Primary Key), the ThreadName, ForumID it belongs to, NumPosts, NumViews, LastPostDateTime, and CreateDateTime. Any help?

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  1. May be storing in another table UserID,threadID, LastReadDateTime when the user read that thread.

    if (LastPostDateTime > LastReadDateTime) you got an unread post.

    Sadly you have a great overhead, on every read you’ll have a write.

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