php中数据库query查出来是null

Question

今天看公司以前的代码发现不论怎么查adminInfoArr查出来总是null值，但在终端运行是对的，在代码上就不对了

$Kobject = new mysqli($host,$user,$pwd,$dbname);
if($Kobject->connect_erron <> 0){
echo"连接失败";
}
        $Kobject->query("SET NAMES UTF8");
        $Ksql="SELECT * FROM s_user WHERE s_name='$userName'";
        $adminInfoArr=$Kobject->query($Ksql);

Answer 1

https://www.cnblogs.com/yiven/p/6484563.html