Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: NO) in G:\XAMPP\htdocs\aiims\user\career\payment_success.php:4 Stack trace: #0 G:\XAMPP\htdocs\aiims\user\career\payment_success.php(4): mysqli->__construct('localhost', 'root', '', 'db_aiims') #1 {main} thrown in G:\XAMPP\htdocs\aiims\user\career\payment_success.php on line 4