protected function SetDefaultFieldVars()
    {
        if ($this->global->UserDataExists(TdbShopArticleReview::INPUT_BASE_NAME)) {
            $aPostUserData = $this->global->GetuserData(TdbShopArticleReview::INPUT_BASE_NAME);
        }
        $aDefaultFieldDataList = array('comment' => '', 'author_email' => '', 'author_name' => '', 'title' => '', 'send_comment_notification' => '0', 'rating' => 1);
        if (isset($aPostUserData) && is_array($aPostUserData)) {
            foreach ($aDefaultFieldDataList as $sDefaultFieldDataKey => $aDefaultFieldDataValue) {
                if (!array_key_exists($sDefaultFieldDataKey, $aPostUserData)) {
                    $aPostUserData[$sDefaultFieldDataKey] = $aDefaultFieldDataValue;
                }
            }
            $aDefaultFieldDataList = $aPostUserData;
        }

        return $aDefaultFieldDataList;
    }