import excel to mysqli ด้วย php ในกรณีที่ ผสานแถวกันต้องทำอย่างไรค่ะ

$inputFileName = "uploads/".$fileName_new;  
                $inputFileType = PHPExcel_IOFactory::identify($inputFileName);  
                $objReader = PHPExcel_IOFactory::createReader($inputFileType);  
                $objReader->setReadDataOnly(true);  
                $objPHPExcel = $objReader->load($inputFileName);  

                $objWorksheet = $objPHPExcel->setActiveSheetIndex(0);
                $highestRow = $objWorksheet->getHighestRow();
                $highestColumn = $objWorksheet->getHighestColumn();

                $headingsArray = $objWorksheet->rangeToArray('A1:'.$highestColumn.'1',null, true, true, true);
                $headingsArray = $headingsArray[1];

                $r = -1;
                $namedDataArray = array();
                for ($row = 2; $row <= $highestRow; ++$row) {
                    $dataRow = $objWorksheet->rangeToArray('A'.$row.':'.$highestColumn.$row,null, true, true, true);
                    if ((isset($dataRow[$row]['A'])) && ($dataRow[$row]['A'] > '')) {
                        ++$r;
                        foreach($headingsArray as $columnKey => $columnHeading) {
                            $namedDataArray[$r][$columnHeading] = $dataRow[$row][$columnKey];
                        }
                    }
                }

                //echo '<pre>';
                //var_dump($namedDataArray);
                //echo '</pre><hr />';

                //*** Connect to MySQL Database ***//
                
               $con = mysqli_connect("localhost","root","01234","glmirai2");
                mysqli_set_charset($con,"utf8");
              
                $i = 0;
                foreach ($namedDataArray as $result) {
                        $i++;
                        $strSQL = "";
                        $strSQL .= "INSERT INTO department ";
                        $strSQL .= "(Depart_ASCode,Decription,Depart_miraiCode,branch) ";
                        $strSQL .= "VALUES ";
                        $strSQL .= "('".$result["Prefixcode"]."' ";
                        $strSQL .= ",'".$result["Description"]."','".$result["De"]."','".$result["De"]."') ";
                       
                        $query = $con->query($strSQL);
                       print_r($namedDataArray);
                       // mysqli_query($strSQL) or die(mysqli_error());
                    
                    
                       
                }
                
                
                mysqli_close($con);