Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
private function writeSheetData(XMLWriter $objWriter, PhpspreadsheetWorksheet $pSheet, array $pStringTable)
    {
        // Flipped stringtable, for faster index searching
        $aFlippedStringTable = $this->getParentWriter()->getWriterPart('stringtable')->flipStringTable($pStringTable);

        // sheetData
        $objWriter->startElement('sheetData');

        // Get column count
        $colCount = Coordinate::columnIndexFromString($pSheet->getHighestColumn());

        // Highest row number
        $highestRow = $pSheet->getHighestRow();

        // Loop through cells
        $cellsByRow = [];
        foreach ($pSheet->getCoordinates() as $coordinate) {
            $cellAddress = Coordinate::coordinateFromString($coordinate);
            $cellsByRow[$cellAddress[1]][] = $coordinate;
        }

        $currentRow = 0;
        while ($currentRow++ < $highestRow) {
            // Get row dimension
            $rowDimension = $pSheet->getRowDimension($currentRow);

            // Write current row?
            $writeCurrentRow = isset($cellsByRow[$currentRow]) || $rowDimension->getRowHeight() >= 0 || $rowDimension->getVisible() == false || $rowDimension->getCollapsed() == true || $rowDimension->getOutlineLevel() > 0 || $rowDimension->getXfIndex() !== null;

            if ($writeCurrentRow) {
                // Start a new row
                $objWriter->startElement('row');
                $objWriter->writeAttribute('r', $currentRow);
                $objWriter->writeAttribute('spans', '1:' . $colCount);

                // Row dimensions
                if ($rowDimension->getRowHeight() >= 0) {
                    $objWriter->writeAttribute('customHeight', '1');
                    $objWriter->writeAttribute('ht', StringHelper::formatNumber($rowDimension->getRowHeight()));
                }

                // Row visibility
                if ($rowDimension->getVisible() == false) {
                    $objWriter->writeAttribute('hidden', 'true');
                }

                // Collapsed
                if ($rowDimension->getCollapsed() == true) {
                    $objWriter->writeAttribute('collapsed', 'true');
                }

                // Outline level
                if ($rowDimension->getOutlineLevel() > 0) {
                    $objWriter->writeAttribute('outlineLevel', $rowDimension->getOutlineLevel());
                }

                // Style
                if ($rowDimension->getXfIndex() !== null) {
                    $objWriter->writeAttribute('s', $rowDimension->getXfIndex());
                    $objWriter->writeAttribute('customFormat', '1');
                }

                // Write cells
                if (isset($cellsByRow[$currentRow])) {
                    foreach ($cellsByRow[$currentRow] as $cellAddress) {
                        // Write cell
                        $this->writeCell($objWriter, $pSheet, $cellAddress, $aFlippedStringTable);
                    }
                }

                // End row
                $objWriter->endElement();
            }
        }

        $objWriter->endElement();
    }
private function writeSheetData(XMLWriter $objWriter, PhpspreadsheetWorksheet $pSheet, array $pStringTable)
    {
        // Flipped stringtable, for faster index searching
        $aFlippedStringTable = $this->getParentWriter()->getWriterPart('stringtable')->flipStringTable($pStringTable);

        // sheetData
        $objWriter->startElement('sheetData');

        // Get column count
        $colCount = Coordinate::columnIndexFromString($pSheet->getHighestColumn());

        // Highest row number
        $highestRow = $pSheet->getHighestRow();

        // Loop through cells
        $cellsByRow = [];
        foreach ($pSheet->getCoordinates() as $coordinate) {
            $cellAddress = Coordinate::coordinateFromString($coordinate);
            $cellsByRow[$cellAddress[1]][] = $coordinate;
        }

        $currentRow = 0;
        while ($currentRow++ < $highestRow) {
            // Get row dimension
            $rowDimension = $pSheet->getRowDimension($currentRow);

            // Write current row?
            $writeCurrentRow = isset($cellsByRow[$currentRow]) || $rowDimension->getRowHeight() >= 0 || $rowDimension->getVisible() == false || $rowDimension->getCollapsed() == true || $rowDimension->getOutlineLevel() > 0 || $rowDimension->getXfIndex() !== null;

            if ($writeCurrentRow) {
                // Start a new row
                $objWriter->startElement('row');
                $objWriter->writeAttribute('r', $currentRow);
                $objWriter->writeAttribute('spans', '1:' . $colCount);

                // Row dimensions
                if ($rowDimension->getRowHeight() >= 0) {
                    $objWriter->writeAttribute('customHeight', '1');
                    $objWriter->writeAttribute('ht', StringHelper::formatNumber($rowDimension->getRowHeight()));
                }

                // Row visibility
                if ($rowDimension->getVisible() == false) {
                    $objWriter->writeAttribute('hidden', 'true');
                }

                // Collapsed
                if ($rowDimension->getCollapsed() == true) {
                    $objWriter->writeAttribute('collapsed', 'true');
                }

                // Outline level
                if ($rowDimension->getOutlineLevel() > 0) {
                    $objWriter->writeAttribute('outlineLevel', $rowDimension->getOutlineLevel());
                }

                // Style
                if ($rowDimension->getXfIndex() !== null) {
                    $objWriter->writeAttribute('s', $rowDimension->getXfIndex());
                    $objWriter->writeAttribute('customFormat', '1');
                }

                // Write cells
                if (isset($cellsByRow[$currentRow])) {
                    foreach ($cellsByRow[$currentRow] as $cellAddress) {
                        // Write cell
                        $this->writeCell($objWriter, $pSheet, $cellAddress, $aFlippedStringTable);
                    }
                }

                // End row
                $objWriter->endElement();
            }
        }

        $objWriter->endElement();
    }
Write SheetData.

@param XMLWriter $objWriter XML Writer
@param PhpspreadsheetWorksheet $pSheet Worksheet
@param string[] $pStringTable String table

@throws WriterException