Fatal error: Uncaught Error: Call to a member function fetch_object() on null in /homepages/8/d766514877/htdocs/htdocs/Developer/Projektarbeit/function.php:359 Stack trace: #0 /homepages/8/d766514877/htdocs/htdocs/Developer/Projektarbeit/index.php(112): schulungen(Object(mysqli)) #1 {main} thrown in /homepages/8/d766514877/htdocs/htdocs/Developer/Projektarbeit/function.php on line 359