PHP select box multiple selections

<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 />';

        }

 } ?>