public static function i($id) { if (self::$i == NULL) { self::$i = new Lesson($id); } return self::$i; }
public function doUpdate() { if ($lessons = Data::get("lessons")) { $lessons = json_decode($lessons); } if (!is_array($lessons)) { return false; } $n = 1; foreach ($lessons as $lessonid) { if ($lessonid) { $lesson = Lesson::i($lessonid); $lesson->subject_seq = $n; $lesson->update(); } $n++; } }