出错 Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in E:\AppServ\www\login\change_password_go.php on line 33 代码是 $query="update t_user set f_userpassword='$OldPassword1' where f_username='{$_SESSION['username']}' "; //必须要在数组前加上{},不然无法解析而报错。加上{}主要让语句识别里面是动态的数 组 $con = mysql_connect("localhost","root","123456"); $result=mysql_query($query); mysql_select_db("test", $con); $row=mysql_fetch_array($result); if (!$row) echo "SQL错误:".mysql_error();