Check Database Credentials: The error can occur if the database credentials in the WordPress configuration file (wp-config.php) are incorrect. Double-check the database name, username, password, and host to ensure they are accurate.
Test Database Connection: Use tools like phpMyAdmin or MySQL command line to test the database connection. If the connection fails, it may indicate an issue with the database server or hosting environment.
Repair Database Tables: WordPress has a built-in feature to repair database tables. You can access it by adding the following line in the wp-config.php file: define(‘WP_ALLOW_REPAIR’, true); Then, visit the URL http://yourwebsite.com/wp-admin/maint/repair.php in your browser and follow the instructions to repair the database tables.
Increase PHP Memory Limit: If the PHP memory limit is too low, it can cause the database connection error. You can increase the memory limit by adding the following line in the wp-config.php file: define(‘WP_MEMORY_LIMIT’, ‘256M’);
