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1. Check Database Connection Configuration: The first step would be to check the database connection configuration and ensure that the correct database host, username, password and database name are entered. In some cases, the database credentials may have changed during the migration process or the configuration needs to be updated to match the new hosting environment.
2. Update Database Connection Settings: If the database connection configuration is correct, then the next step would be to update the database connection settings in the website's configuration files. This could include updating the database host, username, password and other connection parameters based on the new server.
3. Check Database Server Status: It is also important to check the status of the database server to ensure that it is up and running. If the server is down or experiencing technical issues, it can result in a database connection error. If this is the case, contacting the hosting provider for further assistance may be necessary.
4. Repair and Optimize Database: If the database server is up and running, the next step would be to repair and optimize the database. This can be done through the hosting provider's control panel or using a database management tool. Sometimes, a corrupted or poorly optimized database can lead to a database connection error.
5. Check for Plugin or Theme Conflicts: In some cases, a WordPress plugin or theme may be causing the database connection issue. Try disabling all plugins and switching to a default theme to see if the error persists. If not, then it is likely that a specific plugin or theme is causing the problem, which can then be deactivated or updated accordingly.
6. Contact Hosting Provider: If none of the above solutions work, it may be necessary to contact the hosting provider for further assistance. They can check server logs and troubleshoot the issue from their end to determine the root cause of the database connection error.
Overall, resolving a database connection issue requires checking and updating database connection settings, repairing and optimizing the database, checking for conflicts with plugins and themes, and if needed, seeking assistance from the hosting provider. With these steps, the website should be fully operational again.
Best regards,
Giáp Văn Hưng