Warning: mysqli_connect(): (HY000/2002): Connection refused in /customers/9/2/9/shanghai-modern.com/httpd.www/Connections/connection.php on line 9

Fatal error: Uncaught ArgumentCountError: mysqli_error() expects exactly 1 argument, 0 given in /customers/9/2/9/shanghai-modern.com/httpd.www/Connections/connection.php:9
Stack trace:
#0 /customers/9/2/9/shanghai-modern.com/httpd.www/Connections/connection.php(9): mysqli_error()
#1 /customers/9/2/9/shanghai-modern.com/httpd.www/include_common.php(4): require_once('/customers/9/2/...')
#2 /customers/9/2/9/shanghai-modern.com/httpd.www/article.php(3): require_once('/customers/9/2/...')
#3 {main}
  thrown in /customers/9/2/9/shanghai-modern.com/httpd.www/Connections/connection.php on line 9