PHPOffice / PhpSpreadsheet

        $sheetType = ord($recordData[5]);

        // offset: 6; size: var; sheet name

        if ($this->version == self::XLS_BIFF8) {

            $string = self::readUnicodeStringShort(substr($recordData, 6));

            $rec_name = $string['value'];

        } elseif ($this->version == self::XLS_BIFF7) {

            $string = $this->readByteStringShort(substr($recordData, 6));

            $rec_name = $string['value'];

        }

        $this->sheets[] = [

            'name' => $rec_name,

            // add cell value

            // todo: what if string is very long? continue record

            if ($this->version == self::XLS_BIFF8) {

                $string = self::readUnicodeStringLong(substr($recordData, 6));

                $value = $string['value'];

            } else {

                $string = $this->readByteStringLong(substr($recordData, 6));

                $value = $string['value'];

            }

            if ($this->readEmptyCells || trim($value) !== '') {

                $cell = $this->phpSheet->getCell($columnString . ($row + 1));

                $cell->setValueExplicit($value, \PhpOffice\PhpSpreadsheet\Cell\DataType::TYPE_STRING);