Conditionally remove header/footer in Magento - php

Question

I have a module page that can be accessed like
www.example.com/module/controller/action/id/10
I want something like this in my controller's action
$page = (int) Mage::app()->getRequest()->getParam('id');
if($page == '12')
{
$this->getLayout()->unsetBlock('header');
$this->getLayout()->unsetBlock('footer');
}
But above method doesn't work, I guess I'm passing wrong alias to unsetBlock method.
I know how to hide header/footer via layout xml but here I want to hide them in controller.
So basically I am searching an alternative for
<remove name="header"/>
<remove name="footer"/>

Answer 1

I found solution to my own question, sharing because it may help others.
1. Create a new layout handle for the page
// Namespace/Modulename/Model/Observer.php
Class Namespace_Modulename_Model_Observer extends Mage_Core_Model_Abstract
{
public function addAttributeSetHandle(Varien_Event_Observer $observer)
{
$page = (int) Mage::app()->getRequest()->getParam('id');
$handle = sprintf('modulename_controller_action_id_%s', $page);
$update = $observer->getEvent()->getLayout()->getUpdate();
$update->addHandle($handle);
}
}
2. Enable the observer in module's config.xml
// Namespace/Modulename/etc/config.xml
<frontend>
<events>
<controller_action_layout_load_before>
<observers>
<attributesethandle>
<class>Namespace_Modulename_Model_Observer</class>
<method>addAttributeSetHandle</method>
</attributesethandle>
</observers>
</controller_action_layout_load_before>
</events>
</frontend>
3. And then easily change the layout for the handle modulename_controller_action_id_12 in modules layout xml.
<modulename_controller_action_id_12>
<remove name="header"/>
<remove name="footer"/>
<reference name="root">
<action method="setTemplate">
<template>page/1column.phtml</template>
</action>
</reference>
</modulename_controller_action_id_12>