Zend_Form_Element ignore flag not working?

I learnt that开发者_如何学运维 I can set the ignore flag on a Zend_Form_Element so that it's ignored when getting values etc.

I have

$this->addElement('submit', 'btnLogin', array(
    'label' => 'Login',
    'ignore' => true
));

But when I do

foreach ($this->getElements() as $elem) {
    echo $elem->getName() . "<br />";
}

It stills includes the btnLogin

The ignore-flag will only ensure that the form element does not get a name-attribute effectively removing it from the posted form data is not included when retrieving the form values on the form level ($form->getValues()). You won't get the element's value when doing e.g.:

foreach ($form->getValues() as $name => $value) {
    // ...
}