Warning: mysqli_connect(): (HY000/2002): Connection refused in /var/www/html/brequest/Connections/req.php on line 9

Fatal error: Uncaught Error: Call to undefined function mysql_error() in /var/www/html/brequest/Connections/req.php:9 Stack trace: #0 /var/www/html/brequest/j1/demos/detail.php(1): require_once() #1 {main} thrown in /var/www/html/brequest/Connections/req.php on line 9