prepare(" INSERT INTO lessons ( title, description, type, video_url, video_platform, duration, live_platform, live_url, live_date, level, category, price, is_demo, is_active, created_by, created_at ) VALUES ( ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, NOW() ) "); $stmt->execute([ $title, $description, $type, $type === 'video' ? $video_url : null, $type === 'video' ? $video_platform : null, $duration, $type === 'live' ? $live_platform : null, $type === 'live' ? $live_url : null, $live_date, $level, $category, $price, $is_demo, $is_active, $_SESSION['user_id'] ]); set_flash_message('success', 'Lezione creata con successo!'); header('Location: lessons.php'); exit; } catch (PDOException $e) { $error = 'Errore durante la creazione della lezione'; } } } ?>