嵌入式 php中select控件当前值的获取

$current_admin_id = $_GET["current_admin_id"];

echo $current_admin_id;

和其它控件一样的，如：
    <select name="selectname" >
            <option value='1'>11111</option>
            <option value='2' selected>22222</option>
    </select>

提交后，服务器端的$selectname  就等于2了。

<form  action="./admin_operate_admin.php">
<table  align="center" border="1" width="90%" height="30%" id="table1" bordercolor="#A9C9E5" cellspacing="1" >
 <tr>
     <th width="50%" height="27">账户名称</th>
     <th width="50%" height="27">账户操作</th>
   </tr>

 <tr>
       
     <td width="10%" height="45" align="center">
     
     <?php
  $tbl_name = $_SESSION["admin_cfg_table"];
     $sql="select $kf_admin_id from $tbl_name order by $kf_mod_time asc";
  $result=mysql_query($sql);
  ?>
<select name = "current_admin_id">

   <?php
   while($row=mysql_fetch_array($result))
   {
    $value = $row[$kf_admin_id];
   ?>
       
   <option  value= <?php echo $value;?>><?php echo $value;?></option>
 
         <?php
   //unset($value);
   }
   ?>

</select>
  
      </td>
  <td align="center">
      <input type="submit" value="账户管理" />
        </td>
    </tr>
</table>

</form>