Database connection failed

Unable to connect to MySQL for database payroll_db on 127.0.0.1:3306.

Access denied for user 'root'@'localhost' (using password: NO)

Check these items in XAMPP:

1. Start MySQL in the XAMPP Control Panel.

2. Confirm the database payroll_db exists in phpMyAdmin.

3. If MySQL uses a different port, update includes/config.php.