php调用sphinx，总共找到2，但是匹配是空的，为什么？
php包：https://pecl.php.net/package/sphinx版本：1.3.3 sphinx版本：2.0.1
当我查询（＆＃39; @author tairyao＆＃39;，＆＃39; *＆＃39;）时，结果是：
Array
(
[error] =>
[warning] =>
[status] => 0
[fields] => Array
(
[0] => author
[1] => title
[2] => description
)
[attrs] => Array
(
)
[matches] => Array
(
[102373] => Array
(
[weight] => 7702
[attrs] => Array
(
)
)
[102428] => Array
(
[weight] => 7702
[attrs] => Array
(
)
)
)
[total] => 2
[total_found] => 2
[time] => 0
[words] => Array
(
[tairyao] => Array
(
[docs] => 4
[hits] => 4
)
)
)
total和total_found都是2，为什么attrs是空的？