PHP, process multiple select from dropdown menu

Create a dropdown menu, select multiple items which are processed by PHP

multi_select.php

<form action="<?=$_SERVER['PHP_SELF']?>" method="post">
<select name="test[]" multiple="multiple">
 <option value="one">one</option>

 <option value="two">two</option>
 <option value="three">three</option>
 <option value="four">four</option>

 <option value="five">five</option>
</select>
<input type="submit" value="Send" />
</form>

<?php
 $test=$_POST['test'];
 if ($test){
  foreach ($test as $t){echo 'You selected ',$t,'<br />';}
 }
?> 

result:

one two three four five