i use this method all of the time
say you want to pass a bunch of checkbox values when a user selects for deletion., similar to what hotmail has
echo '<input type="checkbox" name="DeleteID[]" value="3">';
.......
when in a form, and the user selects all of the checkbox and hits submit, only the values will appear in a array DeleteID
hope this helps
BTW this also works for key value arrays too!