Ask the user to have a new idea and implementation method after replying to the post.

Q: After replying to a post, I will notify the user of a new reply idea and implementation method. after posting, & nbsp; how do I know there is a new reply in the post? & Nbsp; could you please kindly advise me?
After posting, how do I know that there is a new reply in the post? Please share your thoughts or related materials with us:
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Do I need to refresh the display in real time?
Real-time ajax persistent connection ~ Just refresh the display and import it to the database.
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Create two data tables. The first table is used to store the primary table, that is, your primary table. this table must have a field, used to store the id of the latest Reply
Create another table, which stores the unique content in the reply content. the id column is the unique value for auto-increment.

You can check the latest reply id of the first table during the specified period.
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There are two fields in my comment table. one field records "this is a comment on which Post", and the second field records "this is a reply to which Comment"

Store the primary Post ID and the comment ID respectively.