protected function save_changes_question()
{
$id = DB::escape($this->post->id);
$question = DB::escape($this->post->question);
$answer_1 = DB::escape($this->post->answer_1);
$answer_2 = DB::escape($this->post->answer_2);
$answer_3 = DB::escape($this->post->answer_3);
$answer_4 = DB::escape($this->post->answer_4);
$correct_answer = DB::escape($this->post->correct_answer);
$active = DB::escape($this->post->active);
$new_exam = DB::escape($this->post->new_exam);
ExamsData::edit_question($id, $question, $answer_1, $answer_2, $answer_3, $answer_4, $correct_answer, $active, $new_exam);
ExamsData::increase_exam_version($new_exam);
ExamsData::increase_exam_changed_date($new_exam);
$this->set('message', '<div id="success">Question Updated!</div>');
}