if (isset($style->font->u) && !isset($style->font->u["val"])) {
                $docStyle->getFont()->setUnderline(PHPExcel_Style_Font::UNDERLINE_SINGLE);
            } else if (isset($style->font->u) && isset($style->font->u["val"])) {
                $docStyle->getFont()->setUnderline((string)$style->font->u["val"]);
            }