PHP+MYSQL guestbook (3)_PHP tutorial

Since the paging display is not finished~~ (the main culprit is the power outage today, let’s find an objective reason)~ I can’t post new code today~~
I just put the original database connection statement into an included file `~It will be convenient for future changes~~~
I gradually feel that I can’t do it~~~If I want to improve this guestbook, I must concentrate on reading the information`~~I will start reading this php tomorrow(do For the current mainstream development language) manual~~
When you see something new, use this book immediately~~
There is also something like this php(as The current mainstream development languages) are on the verge of being eliminated ``~~But it doesn’t matter~~ASP has been eliminated for so many years, and there are still so many people using it~~~Don’t be afraid~~Besides, it will be eliminated again How about it? Languages ​​are all similar~~~If you learn this, you are afraid that you won’t be able to learn others~~~