Warning: Declaration of DataBase::query($query) should be compatible with mysqli::query($query, $resultmode = NULL) in /class/DataBase.class.php on line 30

Fatal error: Uncaught Error: Call to undefined method mysqli::mysqli() in /class/DataBase.class.php:41 Stack trace: #0 /class/System.class.php(144): DataBase->__construct('localhost', 'jktransport2', 'WroQcTZAhKoM5Uf...', 'jktransport2') #1 /class/System.class.php(304): System->LoadDataBase() #2 /class/System.class.php(324): System->loadSimpleConfig() #3 /index.php(9): System->__construct() #4 {main} thrown in /class/DataBase.class.php on line 41