getActiveSheet(); $sheet1 = $spreadsheet->getActiveSheet(); $sheet2 = $spreadsheet->createSheet(); $sheet3 = $spreadsheet->createSheet(); $cells = [ ['a1', 'b1', 'c1'], ['a2', 'b2', 'c2'], ]; $sheet1->fromArray($cells); $sheet1->setRightToLeft(true); $sheet2->fromArray($cells); $sheet3->fromArray($cells); $sheet3->setRightToLeft(true); $helper->log('Write to html, mpdf'); // Save $helper->write( $spreadsheet, __FILE__, ['Html', 'Mpdf'], writerCallback: function (HtmlWriter $writer): void { $writer->writeAllSheets(); } ); $spreadsheet->disconnectWorksheets();