Question

I have a site with login system. Any user who logged can make a comment. How should I store comments? What is the best method to store them, in mysql database or a txt file or something else? What kind of design do you recommend?

Answer 1

How about

CREATE  TABLE login_comment (
  `id` INT NOT NULL AUTO_INCREMENT ,
  `user_id` INT NOT NULL ,
  `timestamp` DATETIME NOT NULL DEFAULT current_timestamp ,
 `comment` TEXT NOT NULL ,
PRIMARY KEY (`id`) );

and you should also add a foreign key for the user_id to your users table.