运行下面代码，查出来的acount直接变了，而且var_dump查看最后还多了个1

代码：$u= $this->order('account asc')->find();
echo $this->getLastSql()."<br>";
echo '<pre>';
var_dump($u);

结果：SELECT * FROM `t_user` ORDER BY account asc LIMIT 1
array(13) {
["account"]=>
string(4) "1234"
["statue"]=>
string(1) "1"
["imei"]=>
string(16) "ee944bcab5373745"
["date_time"]=>
string(19) "2021-01-01 15:40:45"
["create_time"]=>
string(19) "2019-09-06 11:34:53"
["update_time"]=>
string(19) "2019-10-14 07:54:26"
["phonex"]=>
string(16) "phonex1568001714"
["pwd"]=>
string(32) "e10adc3949ba59abbe56e057f20f883e"
["remove_time"]=>
string(19) "2020-05-20 00:00:00"
["username"]=>
string(6) "朋友"
["usenumber"]=>
string(1) "0"
["type"]=>
string(1) "0"
["phonenum"]=>
NULL
}
1'


实际数据：account='2020052501' varchar类型