如何用php 循环 option

<code><?php mysql_connect('localhost','root','');
mysql_select_db('test');
mysql_query('set name uft8');
$sql='select * from tset';
$result=mysql_query($sql);


?>



<?php <?php while($row=mysql_fetch_array($result)):
菜单：<select>
<option value="1"><?php $row['username']?></option>
<option value="2">选项二</option>
<option value="3">选项三</option>
      

<?php endwhile?>


?>
</code>

这样好像不行 该咋循环捏

回复内容：

<code><?php mysql_connect('localhost','root','');
mysql_select_db('test');
mysql_query('set name uft8');
$sql='select * from tset';
$result=mysql_query($sql);


?>



<?php <?php while($row=mysql_fetch_array($result)):
菜单：<select>
<option value="1"><?php $row['username']?></option>
<option value="2">选项二</option>
<option value="3">选项三</option>
      

<?php endwhile?>


?>
</code>

这样好像不行 该咋循环捏

<?php 标签不能嵌套吧

多了一个<?php

<?php $row['username']?> 修改成 <?php echo $row['username']?>

<code><?php mysql_connect('localhost','root','');
mysql_select_db('test');
mysql_query('set name uft8');
$sql='select * from tset';
$result=mysql_query($sql);


?>

菜单：<select>

    <?php while($row=mysql_fetch_array($result)):?>
    <option value="<?=$row['id']?>">=$row['username']?></option>
    <?php endwhile?>

 </select>
</code>