PHPOffice / PhpSpreadsheet

            $objWriter->startElement('table:table-cell');

            switch ($cell->getDataType()) {

                case \PhpOffice\PhpSpreadsheet\Cell\DataType::TYPE_BOOL:

                    $objWriter->writeAttribute('office:value-type', 'boolean');

                    $objWriter->writeAttribute('office:value', $cell->getValue());

                    $objWriter->writeElement('text:p', $cell->getValue());

                    break;

                case \PhpOffice\PhpSpreadsheet\Cell\DataType::TYPE_ERROR:

                    throw new \PhpOffice\PhpSpreadsheet\Writer\Exception('Writing of error not implemented yet.');

                    throw new \PhpOffice\PhpSpreadsheet\Writer\Exception('Writing of inline not implemented yet.');

                    break;

                case \PhpOffice\PhpSpreadsheet\Cell\DataType::TYPE_NUMERIC:

                    $objWriter->writeAttribute('office:value-type', 'float');

                    $objWriter->writeAttribute('office:value', $cell->getValue());

                    $objWriter->writeElement('text:p', $cell->getValue());

                    break;

                case \PhpOffice\PhpSpreadsheet\Cell\DataType::TYPE_STRING:

                    $objWriter->writeAttribute('office:value-type', 'string');