PHP通过phpspreadsheet导入Excel日期数据处理方法

$tempData['work_start_time'] = $sheet->getCellByColumnAndRow(6,$row)->getValue();
            // 这里对Excel的时间类型进行判断
            $type1 = strpos($tempData['work_start_time'], '/');
            $type2 = strpos($tempData['work_start_time'], '-');
            if($type1 || $type2){
                $tempData['work_start_time'] = $tempData['work_start_time'];
            }else{
                $tempData['work_start_time']=date('Y-m-d', ($tempData['work_start_time'] - 25569) * 24 * 3600);
            }