PHP Lessons::getLessonByNumber示例

 public function actionShowLesson()
 {
     $auth = Auth::checkAuth();
     $view = new View();
     $view->auth = $auth;
     if (!isset($_GET['id'])) {
         header("Location: /learns/");
     }
     if ($auth) {
         $user = Auth::getUser();
         $id = $_GET['id'];
         $lesson = Lessons::getLesson($id);
         $course = Courses::getCourse($lesson->course_id);
         $lesson_prew = Lessons::getLessonByNumber($lesson->lesson_number - 1, $lesson->course_id);
         $lesson_next = Lessons::getLessonByNumber($lesson->lesson_number + 1, $lesson->course_id);
         $view->user_login = $user->user_login;
         $view->user_group = $user->user_group;
         $view->lesson = $lesson;
         $view->course = $course;
         $view->lesson_prew = $lesson_prew;
         $view->lesson_next = $lesson_next;
         $view->display('header.php');
         $view->display('lessons/lesson_view.php');
         $view->display('footer.php');
     } else {
         header("Location: /learns/");
     }
 }