问如何在PhpSpreadsheet中从合并单元格读取值

EN

        // loop to fill empty value from merged cells //
        for($i=0; $i<count($DuplicatedSheetData);$i++){
            // explode merge cells range //
            $CellIndex = explode(":", $DuplicatedSheetData[$i]);

            // get main cell with value, ex N25:N27 , the value only stored in N25 //
            $CellValue = $spreadsheet->getActiveSheet()->getCell($CellIndex[0])->getValue();

            // starting index //
            $StartIndex = (int) substr($CellIndex[0],1,2);

            // ending index // 
            $EndIndex = (int) substr($CellIndex[1],1,2);
            
            // column name example "A" ,"B" //
            $ColumnName = substr($CellIndex[0],0,1);      
            
            // loop to copy the value from main cell, to other cell //
            for($j = $StartIndex;$j <= $EndIndex; $j++){
                $spreadsheet->getActiveSheet()->setCellValue($ColumnName.$j , $CellValue);
            }

        }

        // map to array and remove empty value //
        $sheetData = $spreadsheet->getActiveSheet()->toArray();
        $sheetData = array_values(array_map('array_filter', $sheetData));