How to delete correspondence?

Question

PHP

Hello. There is a dialogue in which two people correspond, any of them can delete messages, how to make it so that when one deletes messages, the other one has it left ????

Answer 1

The answer, as it were, suggests itself - do not delete, but hide for specific users.

Answer 2

You can make a table that will contain the message-user relationship. When deleting a message by a specific user, just delete the desired link.