关于php运行结果输出的讨论 [ 新手入门 ]

在一个较长的类方法运行时，需要整个方法结束才输出结果 那么如果在中途植入某些变量 通过其他方法去获取这个值是否可行呢？

比如这个动作对应一个载入excel表格的方法

public function actionImport()
{
        if (isset($_POST['filename']))
        {
            $filename = $_POST['filename'];
            $sid = $_POST['sid'];
            $outputname = iconv("UTF-8", "GBK", $filename);
            $uploaddir = dirname(dirname(__FILE__)) . '/../uploads/';
            $file = $uploaddir . $outputname;
            $objPHPExcel = Importexcel::getdata($file);
//            $cookie=new CHttpCookie('sid_'.$sid,0);
//            Yii::app()->request->cookies[$name]=$cookie;
            $allsheet = $objPHPExcel->getSheetCount() - 1;
            $success = 0;
            $issueline = array();
             for ($i = 0; $i < $allsheet; $i++)
            {
                $objPHPExcel->setActiveSheetIndex($i);
                $objWorksheet = $objPHPExcel->getActiveSheet();              //获取excel中sheet(0)的数据
                $EXCEL_VALUE = array();
                foreach ($objWorksheet->getRowIterator() as $row)                                             //遍历数据
                {
                    $cellIterator = $row->getCellIterator();
                    $cellIterator->setIterateOnlyExistingCells(FALSE);
                    foreach ($cellIterator as $cell)
                    {
                        $EXCEL_VALUE[$row->getRowIndex()] [] = $cell->getValue();
                    }
                }
                $data_arr = $EXCEL_VALUE;

//根据$data_arr首行记录对应数据库各个字段内容编号 并记录编号 以后在循环导入时候使用
       $stno = '';  //学号;
                $stname = '';  //姓名;
                $province = '';  //省;
                $area = '';  //地区;                
                $dataline = 0;
                $subject1 = '';
                $score1 = '';
                $subject2 = '';
                $score2 = '';
                $Info = array();
//筛选表格信息

   foreach ($data_arr as $row => $cols)
       {
           foreach ($cols as $col => $value)
              {
               if ($value == '省：')
                 {
                 $province = $cols[$col + 1];
                   if ($province == null)
                   {
                      break 2;
                     }
                 }
                 if ($value == '市县：')
                  $area = $cols[$col + 1];
                if ($value == "学员编号")
                  {
                  $dataline = $row;
                  $stno = $col;
                    $stname = $col + 1;
                    $subject1 = $col + 2;
                    $score1 = $col + 3;
                     $subject2 = $col + 4;
                    $score2 = $col + 5;
                     break 2;
                        }
                    }
                }
                /* */
                foreach ($data_arr as $line => $contexts)
                {
                    if ($province == null)
                        break;
                    if (isset($contexts[$stname]) == FALSE || $contexts[$stname] == '' || $line <= $dataline)
                        continue;
                    if ($line > $dataline && $contexts[$stname] != '')
                    {
                        if ($cols[$subject1] != '')
                        {
                            $model = new Info;
            $model->sheet = $objWorksheet->getTitle();
                            $model->filename = $filename;
                            $model->stno = $contexts[$stno]; //
                            $model->stname = $contexts[$stname];
                            $model->province = $province;
                            $model->area = $area;
                            $model->subject = $contexts[$subject1];
                            $model->score = $contexts[$score1];
                            if ($model->validate())
                            {
                                $model->save(FALSE);
                                $success++;
                            }
                            else
                            {
                                  $issueline[$objWorksheet->getTitle()][]= '第' . $line . '行数据存在错误' ;
                            }
                        }
                        if ($cols[$subject2] != '')
                        {
                            $model1 = new Info;
               $model->sheet = $objWorksheet->getTitle();
                            $model->filename = $filename;
                            $model1->stno = $contexts[$stno]; //
                            $model1->stname = $contexts[$stname];
                            $model1->province = $province;
                            $model1->area = $area;
                            $model1->subject = $contexts[$subject2];
                            $model1->score = $contexts[$score2];
                            if ($model1->validate())
                            {
                                $model1->save(FALSE);
                                $success++;
                            }
                            else
                            {
                                    $issueline[$objWorksheet->getTitle()][]= '第' . $line . '行数据存在错误' ;
                            }
                        }
                    }//endif  $line > $dataline
                }//endforeach 载入数据

                Yii::app()->setGlobalState('sid_'.$sid, ($i + 1) / $allsheet * 100);
//                $cache['progress']['sid'] = ($i + 1) / $allsheet * 100;
            }[/code]通过 另一个方法 获取上面方法执行中间的状态信息[code] public function actionGetprogress($sid)
    {
//        $cache[];
        $app = Yii::app();
        $percent = $app->getGlobalState('sid_'.$sid);        
        $arr = array(
            'percent' => $percent,
            'sid' => $sid
        );
        $json_string = json_encode($arr);
        echo $json_string;
}

结果最后还是不能获得中间状态的值。。。难道输出一定是在程序的结束才能得到么？