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Warning: Undefined variable $user in /var/www/html/images/signal.php on line 8

Warning: Undefined variable $password in /var/www/html/images/signal.php on line 8

Warning: Undefined variable $db in /var/www/html/images/signal.php on line 8

Fatal error: Uncaught mysqli_sql_exception: Access denied for user ''@'localhost' (using password: YES) in /var/www/html/images/signal.php:8 Stack trace: #0 /var/www/html/images/signal.php(8): mysqli->__construct() #1 {main} thrown in /var/www/html/images/signal.php on line 8