When I open the forum, I get a Discuz Database Error, what is the problem?

1. For example, the table content of the MySQL database is too large, and more than 10G may affect the operation of the Discuz forum.

<>3. The database configuration is incorrect, sometimes it may be the host move, the database move, etc., resulting in the database information filling in incorrectly, or the old database information is not updated in time, such as the database user name, password, database table filling error.

4. You can repair the relevant database information, you can find the config directory in the config directory and modify the database information configuration file.

discus！3 There are three reference profiles. Double-check that the database configuration and other configurations are up to date.

Installation directory config config installation directory config config installation directoryFor more information, see the official discuz documentation.

5. The database is not running.

6. Check whether the host's MySQL database program is running or closed. If it's a web host.

You can contact the space provider to turn it on. If the virtual host does not support the MySQL database, you can resolve this issue by replacing the host or space provider.

You yourself said that you changed the root password, and it's not normal to be unable to connect to the database.

You need to change the database password in both files.

config/config_

This is usually a conflict between plugins, especially if you get an error message.

Go into the background and close the latest installed plugin.

There was an error in the database, the password was wrong, etc

This ** database file is missing, and the data should be upgraded or migrated.

The database information is wrong, and it is estimated that this ** is moving.

Solve database and php configuration issues.

Discuz is a general-purpose community forum software system that has been around for about 10 years and is now very mature. It runs on the integration of Apache, PHP and MySQL.

The question prompts a database problem, and there are two possibilities:

1. Check the MySQL database: whether the installation is correct, and the account and password are configured to PHP;

Configure database information.

dbhost = 'localhost'; // database server

Database server.

dbuser = 'dbuser'; // database username

Database username.

dbpw = 'dbpw'; // database password

Database password.

dbname = 'discuz'; // database name

The name of the database.

adminemail = ''; // admin email

Forum system email

dbreport = 0; // send db error report? 1=yes

Do you send database error reports? 0=No, 1=Yes.

2. Check PHP configuration: Is MySQL support enabled in the configuration?

Database Connectivity Test:

dbhost = 'localhost';

dbuser = 'dbuser'; // database username

dbpass = 'dbpw'; // database password

dbname ='discuz'; // database name

link = mysql_connect($dbhost,$dbuser,$dbpass);

if(!$link) echo "fail";

else echo "success";

mysql_close();