That's why the fieldsets are useful: grouping fields. There's no closing pair for the fieldset element: a fieldset started will be closed when there are no more elements left, or another fieldset element is found.
Below are the dumps of some PHP variables - submit the form to see the changes!
Contents of the $_POST array:
$_POST = array (
)
Results of a $clonefish->getElementValues() call: array ( 'inputText' => NULL, 'inputPassword' => NULL, 'textarea' => NULL, 'inputHidden' => 'something you don\'t want the users to see', 'id' => 'fieldset3', )