What the hell is this?

Question

In the database, logging in with the administrator who has been set up shows that the password is incorrect; when the parameter is changed from 1 to 0, that is, when the user becomes an ordinary user, you can log in again. The source code downloaded from https://www.php.cn/course/902.html.

Answer 1

The password is not modified like this. Now the database directly stores the clear text password?

are all encrypted by md5. There must be problems if you change them directly. Good *** video