WordPress database connection error solution revealed

WordPress is currently one of the most popular website building platforms in the world, but during use, you sometimes encounter database connection errors. This kind of error will cause the website to be unable to be accessed normally, causing trouble to the website administrator. This article will reveal how to solve WordPress database connection errors and provide specific code examples to help readers solve this problem more quickly.

Problem Analysis

WordPress database connection errors are usually caused by the following reasons:

1. Incorrect database username or password
2. Database server address error
3. Database name error
4. Database connection timeout
5. Database table damage

Solution

1. Check the database username and password

First, we need to confirm whether the database username and password are correct. In the WordPress configuration file wp-config.php, you can find the relevant configuration information for the database connection. Please ensure that the username and password are consistent with the settings in the database management tool.

define('DB_NAME', 'your_database_name');
define('DB_USER', 'your_database_username');
define('DB_PASSWORD', 'your_database_password');
define('DB_HOST', 'localhost');

2. Check the database server address

Make sure the database server address is configured correctly, usually localhost. If you are using an external database server, please configure it accordingly. Modify the configuration accordingly.

3. Check the database name

Confirm whether the database name is correct. It needs to be consistent with the database name created in the database management tool.

4. Increase the database connection timeout

Sometimes the database connection timeout causes errors. You can add the following code to the wp-config.php file to increase the connection timeout. ：

define('DB_TIMEOUT', 30);

5. Check whether the database table is damaged

Use database management tools such as phpMyAdmin to check whether the database table is damaged. Repairing the damaged table can solve the connection error.

Specific code example

The following is a sample code that can be used for database connection testing in WordPress to check whether the database can be successfully connected:

<?php
$link = mysqli_connect('localhost', 'your_database_username', 'your_database_password', 'your_database_name');

if (!$link) {
    die('Could not connect: ' . mysqli_error());
}

echo 'Connected successfully';

mysqli_close($link);
?>

Replace the above code Save it as an independent PHP file and access the file in the browser. If Connected successfully is output, it means the database connection is normal.

Conclusion

By checking the database user name, password, server address, database name, connection timeout, etc., combined with specific code examples, readers can solve WordPress database connection errors more quickly . I hope this article can help webmasters who encounter this problem.

The above is the detailed content of WordPress database connection error solution revealed. For more information, please follow other related articles on the PHP Chinese website!