mysql-php从数据库中读取某个表中的数据并在页面中一条条列出来，代码如下，数据库里有信息，显示不出来

  <?php        
  include("connectDB.php");        
  @$query=mysql_query($con,"SELECT * from xx");        
  @$result=mysql_fetch_array(@$query);        
  if($result==true){        
  ?>           
  <table width="100%" height="30"  border="0" cellpadding="0" cellspacing="0">            
  <tr>              
  <td height="36" align="center">暂无信息！</td>            
  </tr>          
  </table><table width="100%"  border="0" cellspacing="0" cellpadding="0">
    <tr>
        <td width="13%">      
        <a href="newxx.php">插入信息</a>    
        <td width="13%">      
        <a href="query.php">查询信息</a>    
        </td>
          </tr></table> 
          <?php}else{?>
           <table width="90%"  height="70%" border="0" cellspacing="0" cellpadding="0">
             <tr>
                 
            <td width="13%">     
            <a href="newxx.php">插入信息</a>   
            </td> 
            <td width="13%">     
            <a href="query.php">查询信息</a>
            </td>  </tr></table>  
            <table width="80%" height="70%"  border="1" cellpadding="0" cellspacing="0" bordercolor="#FFFFFF"          
           bordercolordark="#D2E3E6" bordercolorlight="#FFFFFF">         <br>         <br>         <br>         
          <tr align="center"><td align="center">信息</td>
           </tr></table><table width="90%" height="70%"  border="3" cellpadding="1" cellspacing="1" bordercolor="#FFFFFF"         
          bordercolordark="#D2E3E6" bordercolorlight="#FFFFFF">  <tr align="center" bgcolor="#e3F4F7">    
          <td width="10%" bgcolor="#e3F4F7">信息id</td>      
         <td width="30%" bgcolor="#e3F4F7">信息内容</td>    
         <td width="14%" bgcolor="#e3F4F7">查看</td>    <td width="10%" bgcolor="#e3F4F7">修改</td>
        </tr><?php//循环显示数据库信息do{ ?>  <tr>    
        <td style="padding:5px;" bgcolor="#e3F4F7" align=center>&nbsp;
        <?php echo $result['xxid'];?></td>      
       <td style="padding:5px;" bgcolor="#e3F4F7" align=center>&nbsp;
       <?php echo $result['xxnr'];?></td>      
       <td align="center" bgcolor="#e3F4F7"><a href="show.php?$xxid=<?php echo $result['xxid'];?>">查看</a></td>    
       <td align="center" bgcolor="#e3F4F7"><a href="updata.php?$xxid=<?php echo $result['xxid'];?>">修改</a></td>  
       </tr><?php}while(@$result=mysql_fetch_array($query));}?>