Fatal error: Uncaught mysqli_sql_exception: Access denied for user ''@'localhost' (using password: NO) in /var/www/html/mantiqiysavollar/db.php:8 Stack trace: #0 /var/www/html/mantiqiysavollar/db.php(8): mysqli->__construct() #1 /var/www/html/mantiqiysavollar/update_profile.php(2): include('...') #2 {main} thrown in /var/www/html/mantiqiysavollar/db.php on line 8