magento - Display the selected value in dropdown without using javascript

Question

How to Display the selected value when the option is selected in dropdown menu in phtml without using javascript.here is what i have tried so far!.i am trying this one in magento

<form action="<?php echo $this->getUrl('customer/products/simpleproduct') ?>" enctype="multipart/form-data" method="post" id="form-customer-product-new">
<table class="tablepostion">
<tr>
<td>
<select id="sizeoption">
<option value="1">Small</option>
<option value="2">Medium</option>
<option value="3">Large</option>
</select>
<?php 
$a = $_POST['sizeoption'];
echo $a;

?>
</td>
</tr>
</table>

Answer 1

You need to add name of your dropdown.

<select name="mysize" id="sizeoption">
<option value="Small">Small</option>
<option value="Medium">Medium</option>
<option value="Large">Large</option>
</select>

<?php 
$a = $_REQUEST['mysize'];
echo $a;
?>

Thanks,

Answer 2

尝试这个

<?php $a = $_POST['sizeoption']; ?>
<table class="tablepostion">
  <tr>
      <td>
          <select id="sizeoption">
          <option <?php echo ($a ==1)?'selected="selected"' : '' ?>  value="1">Small</option>
          <option <?php echo ($a ==2)?'selected="selected"' : '' ?> value="2">Medium</option>
          <option <?php echo ($a ==3)?'selected="selected"' : '' ?> value="3">Large</option>
          </select>
      </td>
 </tr>
</table>