Fatal error: Uncaught Error: Call to a member function prepare() on null in C:\xampp\htdocs\include\dbase.php:42 Stack trace: #0 C:\xampp\htdocs\conferences\educonf\pages.php(24): Database->query('SELECT * FROM `...') #1 {main} thrown in C:\xampp\htdocs\include\dbase.php on line 42