Warning: mysql_fetch_array() expects parameter 1,该如何解决

Warning: mysql_fetch_array() expects parameter 1
Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in /home/kxmusic/test.php on line 8


本人使用XAMPP for linux 版
在本地机 WAMP 可以使用
但上次到服务器 就出现这个错误
请指教一下 

PHP code

<!--

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--><?php  

02  include("config.php");  

03    

04   if($_POST[submit]){  

05     $username= str_replace(" ","",$_POST[username]);  

06     $_SESSION[login_name]= str_replace(" ","",$_POST[username]);  

07     $sql="select * from user_list where `username` = '$username' and user_static != '0'";  

08     $query=mysql_query($sql);  

09     $us=is_array($row=mysql_fetch_array($query));  

10     $ps= $us ? md5($_POST[password].ALL_PS)== $row[password] : FALSE;  

11     if($ps){  

12         $_SESSION[uid]=$row[uid];  

13         $_SESSION[user_shell]=md5($row[username].$row[password].ALL_PS);  

14         $_SESSION[times]=mktime();  

15         echo "登陆成功";  

16         echo "<a href=\"jianli.php\">add list</a><br/>";  

17         echo "<a href=\"logout.php\">logout</a>";  

18     }else{  

19         echo "密码或者用户名错误";  

20          session_destroy();  

21     }  

22    

23   }  

24    

25    

26    

27 ?>  

28 <LINK href="common.css" type=text/css rel=stylesheet>  

29    

30   <title>::开心肠粉网::开心音乐室</title><form action="" method="post">  

31    

32   username：<input type="text" name="username" style="height:23px" /><br>  

33   password：<input type="password" name="password"  style="height:23px" /><br>  

34   code：<input type="code" name="code" size="10" style="height:23px" />  

35   @@##@@  

36   <br><br>  

37   <input type="submit" name="submit" value="登陆"/>  

38   </form> 

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PHP code

<!--

Code highlighting produced by Actipro CodeHighlighter (freeware)
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-->
<?php  

02  session_start();  

03  //数据库连接  

04  $conn=mysql_connect('localhost','root','');  

05  mysql_select_db('test',$conn);  

06  mysql_query("set names 'gbk'");   

07  //定义常量  

08  define(ALL_PS,"topbase");  

09    

10   function user_shell($uid,$shell,$m_id){  

11     $sql="select * from user_list where `uid` = '$uid'";  

12     $query=mysql_query($sql);  

13     $us=is_array($row=mysql_fetch_array($query));  

14     $shell=$us ? $shell==md5($row[username].$row[password].ALL_PS):FALSE;  

15     if($shell){  

16         if($row[m_id]<=$m_id){  

17            return $row;  

18         }else{  

19         echo "你的权限不足";  

20         exit();  

21         }  

22     }else{  

23      echo "你无权限访问该页";  

24      exit();  

25     }  

26   }  

27    

28     function user_mktime($onlinetime){  

29     $new_time = mktime();  

30     echo $new_time-$onlinetime;  

31     if($new_time-$onlinetime > '1000'){  

32     echo "登录超时";  

33     exit();  

34     session_destroy();  

35    }else{  

36     $_SESSION[times]=mktime();  

37    }  

38   }  

39  ?> 

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var_dump($query);