PHPExcel按单元格读取数据

import('ORG.Util.PHPExcel.PHPExcel');
                    $objReader = new PHPExcel_Reader_Excel2007(); //use excel2007
                    $objPHPExcel = $objReader->load($filename); //指定的文件
                    $sheet = $objPHPExcel->getSheet(0);
                    $highestRow = $sheet->getHighestRow(); // 取得总行数
                    $highestColumn = $sheet->getHighestColumn(); // 取得总列数
                    
                    for($j = 1;$j <= $highestRow; $j++) {                    
                        $cell = $objPHPExcel->getActiveSheet()->getCell("A".$j)->getValue();
                        $data[] = array('typeid'=>$ggtid, 'serverid'=>$ggsid, 'cardno'=>$cell);
                    }