Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Reader/Xml.php
public function loadIntoExisting($pFilename, Spreadsheet $spreadsheet)
    {
        File::assertFile($pFilename);
        if (!$this->canRead($pFilename)) {
            throw new Exception($pFilename . ' is an Invalid Spreadsheet file.');
        }

        $xml = $this->trySimpleXMLLoadString($pFilename);

        $namespaces = $xml->getNamespaces(true);

        $docProps = $spreadsheet->getProperties();
        if (isset($xml->DocumentProperties[0])) {
            foreach ($xml->DocumentProperties[0] as $propertyName => $propertyValue) {
                switch ($propertyName) {
                    case 'Title':
                        $docProps->setTitle(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Subject':
                        $docProps->setSubject(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Author':
                        $docProps->setCreator(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Created':
                        $creationDate = strtotime($propertyValue);
                        $docProps->setCreated($creationDate);

                        break;
                    case 'LastAuthor':
                        $docProps->setLastModifiedBy(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'LastSaved':
                        $lastSaveDate = strtotime($propertyValue);
                        $docProps->setModified($lastSaveDate);

                        break;
                    case 'Company':
                        $docProps->setCompany(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Category':
                        $docProps->setCategory(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Manager':
                        $docProps->setManager(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Keywords':
                        $docProps->setKeywords(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Description':
                        $docProps->setDescription(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                }
            }
        }
        if (isset($xml->CustomDocumentProperties)) {
            foreach ($xml->CustomDocumentProperties[0] as $propertyName => $propertyValue) {
                $propertyAttributes = $propertyValue->attributes($namespaces['dt']);
                $propertyName = preg_replace_callback('/_x([0-9a-z]{4})_/', ['self', 'hex2str'], $propertyName);
                $propertyType = Properties::PROPERTY_TYPE_UNKNOWN;
                switch ((string) $propertyAttributes) {
                    case 'string':
                        $propertyType = Properties::PROPERTY_TYPE_STRING;
                        $propertyValue = trim($propertyValue);

                        break;
                    case 'boolean':
                        $propertyType = Properties::PROPERTY_TYPE_BOOLEAN;
                        $propertyValue = (bool) $propertyValue;

                        break;
                    case 'integer':
                        $propertyType = Properties::PROPERTY_TYPE_INTEGER;
                        $propertyValue = (int) $propertyValue;

                        break;
                    case 'float':
                        $propertyType = Properties::PROPERTY_TYPE_FLOAT;
                        $propertyValue = (float) $propertyValue;

                        break;
                    case 'dateTime.tz':
                        $propertyType = Properties::PROPERTY_TYPE_DATE;
                        $propertyValue = strtotime(trim($propertyValue));

                        break;
                }
                $docProps->setCustomProperty($propertyName, $propertyValue, $propertyType);
            }
        }

        $this->parseStyles($xml, $namespaces);

        $worksheetID = 0;
        $xml_ss = $xml->children($namespaces['ss']);

        foreach ($xml_ss->Worksheet as $worksheet) {
            $worksheet_ss = $worksheet->attributes($namespaces['ss']);

            if ((isset($this->loadSheetsOnly)) && (isset($worksheet_ss['Name'])) &&
                (!in_array($worksheet_ss['Name'], $this->loadSheetsOnly))) {
                continue;
            }

            // Create new Worksheet
            $spreadsheet->createSheet();
            $spreadsheet->setActiveSheetIndex($worksheetID);
            if (isset($worksheet_ss['Name'])) {
                $worksheetName = self::convertStringEncoding((string) $worksheet_ss['Name'], $this->charSet);
                //    Use false for $updateFormulaCellReferences to prevent adjustment of worksheet references in
                //        formula cells... during the load, all formulae should be correct, and we're simply bringing
                //        the worksheet name in line with the formula, not the reverse
                $spreadsheet->getActiveSheet()->setTitle($worksheetName, false, false);
            }

            $columnID = 'A';
            if (isset($worksheet->Table->Column)) {
                foreach ($worksheet->Table->Column as $columnData) {
                    $columnData_ss = $columnData->attributes($namespaces['ss']);
                    if (isset($columnData_ss['Index'])) {
                        $columnID = Coordinate::stringFromColumnIndex((int) $columnData_ss['Index']);
                    }
                    if (isset($columnData_ss['Width'])) {
                        $columnWidth = $columnData_ss['Width'];
                        $spreadsheet->getActiveSheet()->getColumnDimension($columnID)->setWidth($columnWidth / 5.4);
                    }
                    ++$columnID;
                }
            }

            $rowID = 1;
            if (isset($worksheet->Table->Row)) {
                $additionalMergedCells = 0;
                foreach ($worksheet->Table->Row as $rowData) {
                    $rowHasData = false;
                    $row_ss = $rowData->attributes($namespaces['ss']);
                    if (isset($row_ss['Index'])) {
                        $rowID = (int) $row_ss['Index'];
                    }

                    $columnID = 'A';
                    foreach ($rowData->Cell as $cell) {
                        $cell_ss = $cell->attributes($namespaces['ss']);
                        if (isset($cell_ss['Index'])) {
                            $columnID = Coordinate::stringFromColumnIndex((int) $cell_ss['Index']);
                        }
                        $cellRange = $columnID . $rowID;

                        if ($this->getReadFilter() !== null) {
                            if (!$this->getReadFilter()->readCell($columnID, $rowID, $worksheetName)) {
                                ++$columnID;

                                continue;
                            }
                        }

                        if (isset($cell_ss['HRef'])) {
                            $spreadsheet->getActiveSheet()->getCell($cellRange)->getHyperlink()->setUrl($cell_ss['HRef']);
                        }

                        if ((isset($cell_ss['MergeAcross'])) || (isset($cell_ss['MergeDown']))) {
                            $columnTo = $columnID;
                            if (isset($cell_ss['MergeAcross'])) {
                                $additionalMergedCells += (int) $cell_ss['MergeAcross'];
                                $columnTo = Coordinate::stringFromColumnIndex(Coordinate::columnIndexFromString($columnID) + $cell_ss['MergeAcross']);
                            }
                            $rowTo = $rowID;
                            if (isset($cell_ss['MergeDown'])) {
                                $rowTo = $rowTo + $cell_ss['MergeDown'];
                            }
                            $cellRange .= ':' . $columnTo . $rowTo;
                            $spreadsheet->getActiveSheet()->mergeCells($cellRange);
                        }

                        $cellIsSet = $hasCalculatedValue = false;
                        $cellDataFormula = '';
                        if (isset($cell_ss['Formula'])) {
                            $cellDataFormula = $cell_ss['Formula'];
                            $hasCalculatedValue = true;
                        }
                        if (isset($cell->Data)) {
                            $cellValue = $cellData = $cell->Data;
                            $type = DataType::TYPE_NULL;
                            $cellData_ss = $cellData->attributes($namespaces['ss']);
                            if (isset($cellData_ss['Type'])) {
                                $cellDataType = $cellData_ss['Type'];
                                switch ($cellDataType) {
                                    /*
                                    const TYPE_STRING        = 's';
                                    const TYPE_FORMULA        = 'f';
                                    const TYPE_NUMERIC        = 'n';
                                    const TYPE_BOOL            = 'b';
                                    const TYPE_NULL            = 'null';
                                    const TYPE_INLINE        = 'inlineStr';
                                    const TYPE_ERROR        = 'e';
                                    */
                                    case 'String':
                                        $cellValue = self::convertStringEncoding($cellValue, $this->charSet);
                                        $type = DataType::TYPE_STRING;

                                        break;
                                    case 'Number':
                                        $type = DataType::TYPE_NUMERIC;
                                        $cellValue = (float) $cellValue;
                                        if (floor($cellValue) == $cellValue) {
                                            $cellValue = (int) $cellValue;
                                        }

                                        break;
                                    case 'Boolean':
                                        $type = DataType::TYPE_BOOL;
                                        $cellValue = ($cellValue != 0);

                                        break;
                                    case 'DateTime':
                                        $type = DataType::TYPE_NUMERIC;
                                        $cellValue = Date::PHPToExcel(strtotime($cellValue));

                                        break;
                                    case 'Error':
                                        $type = DataType::TYPE_ERROR;

                                        break;
                                }
                            }

                            if ($hasCalculatedValue) {
                                $type = DataType::TYPE_FORMULA;
                                $columnNumber = Coordinate::columnIndexFromString($columnID);
                                if (substr($cellDataFormula, 0, 3) == 'of:') {
                                    $cellDataFormula = substr($cellDataFormula, 3);
                                    $temp = explode('"', $cellDataFormula);
                                    $key = false;
                                    foreach ($temp as &$value) {
                                        //    Only replace in alternate array entries (i.e. non-quoted blocks)
                                        if ($key = !$key) {
                                            $value = str_replace(['[.', '.', ']'], '', $value);
                                        }
                                    }
                                } else {
                                    //    Convert R1C1 style references to A1 style references (but only when not quoted)
                                    $temp = explode('"', $cellDataFormula);
                                    $key = false;
                                    foreach ($temp as &$value) {
                                        //    Only replace in alternate array entries (i.e. non-quoted blocks)
                                        if ($key = !$key) {
                                            preg_match_all('/(R(\[?-?\d*\]?))(C(\[?-?\d*\]?))/', $value, $cellReferences, PREG_SET_ORDER + PREG_OFFSET_CAPTURE);
                                            //    Reverse the matches array, otherwise all our offsets will become incorrect if we modify our way
                                            //        through the formula from left to right. Reversing means that we work right to left.through
                                            //        the formula
                                            $cellReferences = array_reverse($cellReferences);
                                            //    Loop through each R1C1 style reference in turn, converting it to its A1 style equivalent,
                                            //        then modify the formula to use that new reference
                                            foreach ($cellReferences as $cellReference) {
                                                $rowReference = $cellReference[2][0];
                                                //    Empty R reference is the current row
                                                if ($rowReference == '') {
                                                    $rowReference = $rowID;
                                                }
                                                //    Bracketed R references are relative to the current row
                                                if ($rowReference[0] == '[') {
                                                    $rowReference = $rowID + trim($rowReference, '[]');
                                                }
                                                $columnReference = $cellReference[4][0];
                                                //    Empty C reference is the current column
                                                if ($columnReference == '') {
                                                    $columnReference = $columnNumber;
                                                }
                                                //    Bracketed C references are relative to the current column
                                                if ($columnReference[0] == '[') {
                                                    $columnReference = $columnNumber + trim($columnReference, '[]');
                                                }
                                                $A1CellReference = Coordinate::stringFromColumnIndex($columnReference) . $rowReference;
                                                $value = substr_replace($value, $A1CellReference, $cellReference[0][1], strlen($cellReference[0][0]));
                                            }
                                        }
                                    }
                                }
                                unset($value);
                                //    Then rebuild the formula string
                                $cellDataFormula = implode('"', $temp);
                            }

                            $spreadsheet->getActiveSheet()->getCell($columnID . $rowID)->setValueExplicit((($hasCalculatedValue) ? $cellDataFormula : $cellValue), $type);
                            if ($hasCalculatedValue) {
                                $spreadsheet->getActiveSheet()->getCell($columnID . $rowID)->setCalculatedValue($cellValue);
                            }
                            $cellIsSet = $rowHasData = true;
                        }

                        if (isset($cell->Comment)) {
                            $commentAttributes = $cell->Comment->attributes($namespaces['ss']);
                            $author = 'unknown';
                            if (isset($commentAttributes->Author)) {
                                $author = (string) $commentAttributes->Author;
                            }
                            $node = $cell->Comment->Data->asXML();
                            $annotation = strip_tags($node);
                            $spreadsheet->getActiveSheet()->getComment($columnID . $rowID)->setAuthor(self::convertStringEncoding($author, $this->charSet))->setText($this->parseRichText($annotation));
                        }

                        if (($cellIsSet) && (isset($cell_ss['StyleID']))) {
                            $style = (string) $cell_ss['StyleID'];
                            if ((isset($this->styles[$style])) && (!empty($this->styles[$style]))) {
                                if (!$spreadsheet->getActiveSheet()->cellExists($columnID . $rowID)) {
                                    $spreadsheet->getActiveSheet()->getCell($columnID . $rowID)->setValue(null);
                                }
                                $spreadsheet->getActiveSheet()->getStyle($cellRange)->applyFromArray($this->styles[$style]);
                            }
                        }
                        ++$columnID;
                        while ($additionalMergedCells > 0) {
                            ++$columnID;
                            --$additionalMergedCells;
                        }
                    }

                    if ($rowHasData) {
                        if (isset($row_ss['Height'])) {
                            $rowHeight = $row_ss['Height'];
                            $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setRowHeight($rowHeight);
                        }
                    }

                    ++$rowID;
                }
            }
            ++$worksheetID;
        }

        // Return
        return $spreadsheet;
    }
public function loadIntoExisting($pFilename, Spreadsheet $spreadsheet)
    {
        File::assertFile($pFilename);
        if (!$this->canRead($pFilename)) {
            throw new Exception($pFilename . ' is an Invalid Spreadsheet file.');
        }

        $xml = $this->trySimpleXMLLoadString($pFilename);

        $namespaces = $xml->getNamespaces(true);

        $docProps = $spreadsheet->getProperties();
        if (isset($xml->DocumentProperties[0])) {
            foreach ($xml->DocumentProperties[0] as $propertyName => $propertyValue) {
                switch ($propertyName) {
                    case 'Title':
                        $docProps->setTitle(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Subject':
                        $docProps->setSubject(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Author':
                        $docProps->setCreator(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Created':
                        $creationDate = strtotime($propertyValue);
                        $docProps->setCreated($creationDate);

                        break;
                    case 'LastAuthor':
                        $docProps->setLastModifiedBy(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'LastSaved':
                        $lastSaveDate = strtotime($propertyValue);
                        $docProps->setModified($lastSaveDate);

                        break;
                    case 'Company':
                        $docProps->setCompany(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Category':
                        $docProps->setCategory(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Manager':
                        $docProps->setManager(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Keywords':
                        $docProps->setKeywords(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                    case 'Description':
                        $docProps->setDescription(self::convertStringEncoding($propertyValue, $this->charSet));

                        break;
                }
            }
        }
        if (isset($xml->CustomDocumentProperties)) {
            foreach ($xml->CustomDocumentProperties[0] as $propertyName => $propertyValue) {
                $propertyAttributes = $propertyValue->attributes($namespaces['dt']);
                $propertyName = preg_replace_callback('/_x([0-9a-z]{4})_/', ['self', 'hex2str'], $propertyName);
                $propertyType = Properties::PROPERTY_TYPE_UNKNOWN;
                switch ((string) $propertyAttributes) {
                    case 'string':
                        $propertyType = Properties::PROPERTY_TYPE_STRING;
                        $propertyValue = trim($propertyValue);

                        break;
                    case 'boolean':
                        $propertyType = Properties::PROPERTY_TYPE_BOOLEAN;
                        $propertyValue = (bool) $propertyValue;

                        break;
                    case 'integer':
                        $propertyType = Properties::PROPERTY_TYPE_INTEGER;
                        $propertyValue = (int) $propertyValue;

                        break;
                    case 'float':
                        $propertyType = Properties::PROPERTY_TYPE_FLOAT;
                        $propertyValue = (float) $propertyValue;

                        break;
                    case 'dateTime.tz':
                        $propertyType = Properties::PROPERTY_TYPE_DATE;
                        $propertyValue = strtotime(trim($propertyValue));

                        break;
                }
                $docProps->setCustomProperty($propertyName, $propertyValue, $propertyType);
            }
        }

        $this->parseStyles($xml, $namespaces);

        $worksheetID = 0;
        $xml_ss = $xml->children($namespaces['ss']);

        foreach ($xml_ss->Worksheet as $worksheet) {
            $worksheet_ss = $worksheet->attributes($namespaces['ss']);

            if ((isset($this->loadSheetsOnly)) && (isset($worksheet_ss['Name'])) &&
                (!in_array($worksheet_ss['Name'], $this->loadSheetsOnly))) {
                continue;
            }

            // Create new Worksheet
            $spreadsheet->createSheet();
            $spreadsheet->setActiveSheetIndex($worksheetID);
            if (isset($worksheet_ss['Name'])) {
                $worksheetName = self::convertStringEncoding((string) $worksheet_ss['Name'], $this->charSet);
                //    Use false for $updateFormulaCellReferences to prevent adjustment of worksheet references in
                //        formula cells... during the load, all formulae should be correct, and we're simply bringing
                //        the worksheet name in line with the formula, not the reverse
                $spreadsheet->getActiveSheet()->setTitle($worksheetName, false, false);
            }

            $columnID = 'A';
            if (isset($worksheet->Table->Column)) {
                foreach ($worksheet->Table->Column as $columnData) {
                    $columnData_ss = $columnData->attributes($namespaces['ss']);
                    if (isset($columnData_ss['Index'])) {
                        $columnID = Coordinate::stringFromColumnIndex((int) $columnData_ss['Index']);
                    }
                    if (isset($columnData_ss['Width'])) {
                        $columnWidth = $columnData_ss['Width'];
                        $spreadsheet->getActiveSheet()->getColumnDimension($columnID)->setWidth($columnWidth / 5.4);
                    }
                    ++$columnID;
                }
            }

            $rowID = 1;
            if (isset($worksheet->Table->Row)) {
                $additionalMergedCells = 0;
                foreach ($worksheet->Table->Row as $rowData) {
                    $rowHasData = false;
                    $row_ss = $rowData->attributes($namespaces['ss']);
                    if (isset($row_ss['Index'])) {
                        $rowID = (int) $row_ss['Index'];
                    }

                    $columnID = 'A';
                    foreach ($rowData->Cell as $cell) {
                        $cell_ss = $cell->attributes($namespaces['ss']);
                        if (isset($cell_ss['Index'])) {
                            $columnID = Coordinate::stringFromColumnIndex((int) $cell_ss['Index']);
                        }
                        $cellRange = $columnID . $rowID;

                        if ($this->getReadFilter() !== null) {
                            if (!$this->getReadFilter()->readCell($columnID, $rowID, $worksheetName)) {
                                ++$columnID;

                                continue;
                            }
                        }

                        if (isset($cell_ss['HRef'])) {
                            $spreadsheet->getActiveSheet()->getCell($cellRange)->getHyperlink()->setUrl($cell_ss['HRef']);
                        }

                        if ((isset($cell_ss['MergeAcross'])) || (isset($cell_ss['MergeDown']))) {
                            $columnTo = $columnID;
                            if (isset($cell_ss['MergeAcross'])) {
                                $additionalMergedCells += (int) $cell_ss['MergeAcross'];
                                $columnTo = Coordinate::stringFromColumnIndex(Coordinate::columnIndexFromString($columnID) + $cell_ss['MergeAcross']);
                            }
                            $rowTo = $rowID;
                            if (isset($cell_ss['MergeDown'])) {
                                $rowTo = $rowTo + $cell_ss['MergeDown'];
                            }
                            $cellRange .= ':' . $columnTo . $rowTo;
                            $spreadsheet->getActiveSheet()->mergeCells($cellRange);
                        }

                        $cellIsSet = $hasCalculatedValue = false;
                        $cellDataFormula = '';
                        if (isset($cell_ss['Formula'])) {
                            $cellDataFormula = $cell_ss['Formula'];
                            $hasCalculatedValue = true;
                        }
                        if (isset($cell->Data)) {
                            $cellValue = $cellData = $cell->Data;
                            $type = DataType::TYPE_NULL;
                            $cellData_ss = $cellData->attributes($namespaces['ss']);
                            if (isset($cellData_ss['Type'])) {
                                $cellDataType = $cellData_ss['Type'];
                                switch ($cellDataType) {
                                    /*
                                    const TYPE_STRING        = 's';
                                    const TYPE_FORMULA        = 'f';
                                    const TYPE_NUMERIC        = 'n';
                                    const TYPE_BOOL            = 'b';
                                    const TYPE_NULL            = 'null';
                                    const TYPE_INLINE        = 'inlineStr';
                                    const TYPE_ERROR        = 'e';
                                    */
                                    case 'String':
                                        $cellValue = self::convertStringEncoding($cellValue, $this->charSet);
                                        $type = DataType::TYPE_STRING;

                                        break;
                                    case 'Number':
                                        $type = DataType::TYPE_NUMERIC;
                                        $cellValue = (float) $cellValue;
                                        if (floor($cellValue) == $cellValue) {
                                            $cellValue = (int) $cellValue;
                                        }

                                        break;
                                    case 'Boolean':
                                        $type = DataType::TYPE_BOOL;
                                        $cellValue = ($cellValue != 0);

                                        break;
                                    case 'DateTime':
                                        $type = DataType::TYPE_NUMERIC;
                                        $cellValue = Date::PHPToExcel(strtotime($cellValue));

                                        break;
                                    case 'Error':
                                        $type = DataType::TYPE_ERROR;

                                        break;
                                }
                            }

                            if ($hasCalculatedValue) {
                                $type = DataType::TYPE_FORMULA;
                                $columnNumber = Coordinate::columnIndexFromString($columnID);
                                if (substr($cellDataFormula, 0, 3) == 'of:') {
                                    $cellDataFormula = substr($cellDataFormula, 3);
                                    $temp = explode('"', $cellDataFormula);
                                    $key = false;
                                    foreach ($temp as &$value) {
                                        //    Only replace in alternate array entries (i.e. non-quoted blocks)
                                        if ($key = !$key) {
                                            $value = str_replace(['[.', '.', ']'], '', $value);
                                        }
                                    }
                                } else {
                                    //    Convert R1C1 style references to A1 style references (but only when not quoted)
                                    $temp = explode('"', $cellDataFormula);
                                    $key = false;
                                    foreach ($temp as &$value) {
                                        //    Only replace in alternate array entries (i.e. non-quoted blocks)
                                        if ($key = !$key) {
                                            preg_match_all('/(R(\[?-?\d*\]?))(C(\[?-?\d*\]?))/', $value, $cellReferences, PREG_SET_ORDER + PREG_OFFSET_CAPTURE);
                                            //    Reverse the matches array, otherwise all our offsets will become incorrect if we modify our way
                                            //        through the formula from left to right. Reversing means that we work right to left.through
                                            //        the formula
                                            $cellReferences = array_reverse($cellReferences);
                                            //    Loop through each R1C1 style reference in turn, converting it to its A1 style equivalent,
                                            //        then modify the formula to use that new reference
                                            foreach ($cellReferences as $cellReference) {
                                                $rowReference = $cellReference[2][0];
                                                //    Empty R reference is the current row
                                                if ($rowReference == '') {
                                                    $rowReference = $rowID;
                                                }
                                                //    Bracketed R references are relative to the current row
                                                if ($rowReference[0] == '[') {
                                                    $rowReference = $rowID + trim($rowReference, '[]');
                                                }
                                                $columnReference = $cellReference[4][0];
                                                //    Empty C reference is the current column
                                                if ($columnReference == '') {
                                                    $columnReference = $columnNumber;
                                                }
                                                //    Bracketed C references are relative to the current column
                                                if ($columnReference[0] == '[') {
                                                    $columnReference = $columnNumber + trim($columnReference, '[]');
                                                }
                                                $A1CellReference = Coordinate::stringFromColumnIndex($columnReference) . $rowReference;
                                                $value = substr_replace($value, $A1CellReference, $cellReference[0][1], strlen($cellReference[0][0]));
                                            }
                                        }
                                    }
                                }
                                unset($value);
                                //    Then rebuild the formula string
                                $cellDataFormula = implode('"', $temp);
                            }

                            $spreadsheet->getActiveSheet()->getCell($columnID . $rowID)->setValueExplicit((($hasCalculatedValue) ? $cellDataFormula : $cellValue), $type);
                            if ($hasCalculatedValue) {
                                $spreadsheet->getActiveSheet()->getCell($columnID . $rowID)->setCalculatedValue($cellValue);
                            }
                            $cellIsSet = $rowHasData = true;
                        }

                        if (isset($cell->Comment)) {
                            $commentAttributes = $cell->Comment->attributes($namespaces['ss']);
                            $author = 'unknown';
                            if (isset($commentAttributes->Author)) {
                                $author = (string) $commentAttributes->Author;
                            }
                            $node = $cell->Comment->Data->asXML();
                            $annotation = strip_tags($node);
                            $spreadsheet->getActiveSheet()->getComment($columnID . $rowID)->setAuthor(self::convertStringEncoding($author, $this->charSet))->setText($this->parseRichText($annotation));
                        }

                        if (($cellIsSet) && (isset($cell_ss['StyleID']))) {
                            $style = (string) $cell_ss['StyleID'];
                            if ((isset($this->styles[$style])) && (!empty($this->styles[$style]))) {
                                if (!$spreadsheet->getActiveSheet()->cellExists($columnID . $rowID)) {
                                    $spreadsheet->getActiveSheet()->getCell($columnID . $rowID)->setValue(null);
                                }
                                $spreadsheet->getActiveSheet()->getStyle($cellRange)->applyFromArray($this->styles[$style]);
                            }
                        }
                        ++$columnID;
                        while ($additionalMergedCells > 0) {
                            ++$columnID;
                            --$additionalMergedCells;
                        }
                    }

                    if ($rowHasData) {
                        if (isset($row_ss['Height'])) {
                            $rowHeight = $row_ss['Height'];
                            $spreadsheet->getActiveSheet()->getRowDimension($rowID)->setRowHeight($rowHeight);
                        }
                    }

                    ++$rowID;
                }
            }
            ++$worksheetID;
        }

        // Return
        return $spreadsheet;
    }
Loads from file into Spreadsheet instance.

@param string $pFilename
@param Spreadsheet $spreadsheet

@throws Exception

@return Spreadsheet