Spreadsheet_Excel_Reader一列显示PHP中的问号读数

Question

请检查此图像######显示阙标记的值。如果我在数据库上传此列值，则此值保存为???????等。

我在php中使用Spreadsheet_Excel_Reader

$data = new Spreadsheet_Excel_Reader("/var/www/office/office/public_html/aumfiles1/$file",true);


$folioNumber    =   addslashes(trim($data->val($j,3)));


??????????

SELECT rUnits FROM test_trans1 WHERE folioNumber='??????????' and productCode='test' and arn_id='66' and data_type='KARVY'

update test_trans1 set rUnits = '1458.747' WHERE folioNumber='??????????' and productCode='test' and arn_id='66' and data_type='KARVY'

??????????