getActiveSheet(); $sheet1->setShowGridlines(false); $sheet1->setPrintGridlines(false); $sheet1->fromArray([ [11, 12, 13], [14, 15, 16], ]); $sheet2 = $spreadsheet->createSheet(); $sheet2->setShowGridlines(false); $sheet2->setPrintGridlines(true); $sheet2->fromArray([ [21, 22, 23], [24, 25, 26], ]); $sheet3 = $spreadsheet->createSheet(); $sheet3->setShowGridlines(true); $sheet3->setPrintGridlines(false); $sheet3->fromArray([ [31, 32, 33], [34, 35, 36], ]); $sheet4 = $spreadsheet->createSheet(); $sheet4->setShowGridlines(true); $sheet4->setPrintGridlines(true); $sheet4->fromArray([ [41, 42, 43], [44, 45, 46], ]); $writer = new Tcpdf($spreadsheet); $writer->writeAllSheets(); $writer->setUseInlineCss(true); $html = $writer->generateHtmlAll(); self::assertStringContainsString( '