Fatal error: Uncaught mysqli_sql_exception: Connection refused in /var/www/html/src/requireLogin.php:18 Stack trace: #0 /var/www/html/src/requireLogin.php(18): mysqli->__construct() #1 /var/www/html/index.php(3): require('...') #2 {main} thrown in /var/www/html/src/requireLogin.php on line 18