By Wpexpert 
Database connection error is one of the most common and disruptive errors for WordPress websites. This error usually appears when WordPress is unable to connect to the MySQL database, causing the website to not display content. This article will guide you through how to fix the database connection error in WordPress in detail.
Causes of Database Connection Errors
Database connection errors often occur due to one of the following reasons:
- Incorrect database login information (username, password, database name, or database server).
- The database server is down or unavailable.
- Database is corrupted or overloaded.
- File configuration wp-config.php wrong
How to Fix Database Connection Errors
To fix this error, you can follow some of the methods below. Note that before making any changes, you should backup your website.
1. Check wp-config.php File
File wp-config.php contains database connection information, including the database name, username, password, and database server. To test, open this file and make sure the following information is correct:
define('DB_NAME', 'database_name');
define('DB_USER', 'database_user');
define('DB_PASSWORD', 'database_password');
define('DB_HOST', 'localhost');
If you are unsure of your database login information, contact your hosting provider for the correct information.
2. Check Database Server
If the information in the file wp-config.php yes, the problem could be with the database server. You can check if the database server is up and running by contacting your hosting provider or trying to connect to the database via phpMyAdmin.
- Log in to cPanel or hosting management page.
- Open phpMyAdmin and try to connect to the database.
- If the connection fails, the database server may be down.
3. Fix Corrupt Database Error
If your database is corrupted, you can repair it by adding the following line to the file wp-config.php:
define('WP_ALLOW_REPAIR', true);
After adding this command line, go to the following path to repair the database:
//yourdomain.com/wp-admin/maint/repair.php
Once repaired, remove the above line to ensure your site is secure.
4. Contact Hosting Provider
If the above methods do not resolve the error, the problem may lie with the database server or server configuration. Contact your hosting provider for support to check and fix the problem.
Tips to Avoid Database Connection Errors
To avoid encountering database connection errors in the future, you should take the following measures:
- Regular database backups: Regular backups help you recover data quickly if something goes wrong.
- Use reputable hosting: Make sure your hosting provider has stable server infrastructure and good technical support.
- Update WordPress and plugins: Make sure your WordPress, plugins, and themes are always up to date to avoid conflicts and security flaws.
WordPress Database Connection Error
A database connection error in WordPress can cause serious disruption to your website. However, by following the methods above, you can quickly fix this error and get your website back up and running. If the issue still persists, contact your hosting provider or WordPress developer for further assistance.
