public function showManagement() { $controller = new Management(); switch ($_GET['type']) { case 'authors': $rows = $controller->getAutorsData(); include 'view/management/authors.php'; break; case 'books': $rows = $controller->getBooksData(); include 'view/management/books.php'; break; case 'editorials': $rows = $controller->getEditorialsData(); include 'view/management/editorials.php'; break; case 'genres': $rows = $controller->getGenres(); include 'view/management/genres.php'; break; case 'readers': $rows = $controller->getUsers(); include 'view/management/users.php'; break; case 'statistics': $data = $controller->getStatistics(); include 'view/management/statistics.php'; break; } }