Facebook.php

<?php
class Me_Controller_Plugin_Facebook extends Zend_Controller_Plugin_Abstract
{
	public function preDispatch($request)
	{
		//Initialize Facebook Api
		require(APPLICATION_PATH.'/../library/facebook.php');
		$facebook = new Facebook(array(
			'appId'  => FACEBOOK_APIKEY,
			'secret' => FACEBOOK_APISECRET,
			'cookie' => true,
		));

		//Get facebook session of user
		$session = $facebook->getSession();
				
		//User connected 
		if($session) {
			$fbUserId = $facebook->getUser();
			$me = $facebook->api('/me');
			$access_token = $session['access_token'];
		} 
		
		//User not connected so redirected to facebook login url
		else {
			$redirector = Zend_Controller_Action_HelperBroker::getStaticHelper('redirector');
			$redirector->gotoUrl($facebook->getLoginUrl(array()));
		}
	}
}
?>