public function delete($id)
 {
     $id = (int) $id;
     $question = $this->getById($id);
     $managerProp = new PropositionManager();
     foreach ($question->getPropositions() as $prop) {
         $managerProp->delete($prop->getId());
     }
     $this->_access->delete(StudyPressDB::getTableNameQuestions(), array(StudyPressDB::COL_ID_QUESTION => $id));
 }
        $vv->run();
        if (sizeof($vv->errors) > 0 || sizeof($vq->errors) > 0) {
            header("HTTP/1.0 400 Bad Request");
            $tr->_e("Please fill in all fields");
            exit;
        }
        if (count($vv->sanitized) !== count($checked) || count($vv->sanitized) < 2 || !in_array("true", $checked, true)) {
            header("HTTP/1.0 400 Bad Request");
            $tr->_e("Please select at least one correct answer");
            exit;
        }
        if ($managerQuiz->getById($vq->sanitized['id_quiz']) && ($question = $managerQuestion->getById($vq->sanitized['id_question']))) {
            $question->setContent($vq->sanitized['question']);
            $managerQuestion->update($vq->sanitized['id_question'], $question);
            foreach ($question->getPropositions() as $prop) {
                $managerProp->delete($prop->getId());
            }
            foreach ($vv->sanitized as $key => $value) {
                $managerProp->add(new Proposition(array('content' => $vv->sanitized[$key], 'questionId' => $question->getId(), 'type' => $checked[$key])));
            }
            echo "true";
        }
    } else {
        header("HTTP/1.0 400 Bad Request");
        $tr->_e("Please fill in all fields");
    }
    exit;
}
if (isset($_POST['type']) && $_POST['type'] === "order-question") {
    if (isset($_POST['order']) && !empty($_POST['order'])) {
        $managerQuestion = new QuestionManager();