Warning: Undefined variable $db in /htdocs/admin/config/dbconfig.php on line 30

Fatal error: Uncaught Error: Call to a member function prepare() on null in /htdocs/admin/config/dbconfig.php:30 Stack trace: #0 /htdocs/index.php(2): require_once() #1 {main} thrown in /htdocs/admin/config/dbconfig.php on line 30