Fatal error: Uncaught Error: Call to a member function fetch_object() on boolean in /usr/share/nginx/html/admin/includes/function.php:292 Stack trace: #0 /usr/share/nginx/html/detail.php(51): getTotalFuelCost(NULL, '2011', NULL, '15000', '3') #1 {main} thrown in /usr/share/nginx/html/admin/includes/function.php on line 292