Mysql-request PHP to reply to the comment code

After replying like Baidu post bar, you can display the comment content below. After replying like Baidu post bar, you can display the comment content below.

Reply content:

The comment content can be displayed below After replying like Baidu Post Bar

Take segmentfault as an example:
The landlord sent a question. There are multiple answers to this question, and there is a one-to-many relationship in the database.
Each answer can have multiple replies, which is also a one-to-many relationship.
Question (id, user_id, question_content)
Answer (id, question_id, user_id, answer_content)
Reply (id, answer_id, user_id, reply_content)

This problem...
Direct Ajax, with css display on OK

How to Use ajax and ajax? The principle is
When you click,ReplyButton to request the server using ajax,
After receiving the request, the server performs operations such as database storage and xxx,
Then retrieve all the related comments, make an interface in json format, and return
Then, use javascript to operate on the json and dynamically Add the data to the corresponding comment location.

Ajax and css display

Can tell you the general idea
Use ajax to send a request for adding a comment like comment. php. If the request returns the successfully added status, append the comment to the bottom of the comment list. If the comment fails, perform corresponding failure processing.

It is recommended that you use native js to implement ajax.