<?
$db=new mysqli('210.34.140.210','sw1304','sw1304','sw1304');
$query="select * from stu where xh=$xh";
$result=$db->query($query);
$row=$result->fetch_assoc();
?>
为什么会出现下面的错误
Fatal error: Call to a member function fetch_assoc() on a non-object in E:\APMServ5.2.6\www\htdocs\sy11_1\s1.php on line 5