Facebook Fan Page Zend Framework View Helper

This is my first Zend Framework article, and I still only grasp about 5% of it, so please be constructive in your criticism!

Following on from my article on how to produce a Facebook fan page widget using valid code, I wanted to see if I could create a View Helper in Zend Framework that does the work for us.

My library is called Gamajo and so the class file below sits at library/Gamajo/View/Helper/FacebookFanPage.php.

/**
 * @category Gamajo
 * @package Gamajo_View
 * @subpackage Helper
 * @author Gary Jones
 * @copyright Gamajo Tech
 * @license http://gamajo.com/new-bsd-license/
 * @link http://code.garyjones.co.uk/facebook-fan-page-zend-framework-view-helper/
 * @since 2010-04-01
 * @version 2010-04-01
 */

/**
 * Facebook fan page view helper
 *
 * Usage:
 * <code>echo $this->facebookFanPage(140949818337, array('stream'=>'0'));</code>
 */
class Gamajo_View_Helper_FacebookFanPage extends Zend_View_Helper_Abstract {

	/**
	 * Add a Facebook Fan Page
	 *
	 * @throws Zend_View_Exception
	 * @param integer $fbid ID that Facebook gives to the fan page
	 * @param array $attribs Attributes for class name, number of connections and stream
	 * @return string
	 */
	public function facebookFanPage( $fbid, $attribs = array( ) ) {
		$filter = new Zend_Filter_Digits();
		$fbid = $filter->filter( $fbid );

		if ( ! is_numeric( $fbid ) ) {
			require_once 'Zend/View/Exception.php';
			$e = new Zend_View_Exception( 'First param must be an integer' );
			$e->setView( $this->view );
			throw $e;
		}

		// Merge default values
		$attribs = array_merge( array( 'connections' => 12,
			'stream' => 1,
			'class' => 'facebook_fans' ), $attribs );

		extract( $attribs );

		$xhtml = '<!--[if !IE]><!-->';
		$xhtml .= $this->view->htmlObject( 'http://www.facebook.com/connect/connect.php?id=' . $fbid
						. '&amp;amp;connections=' . $connections . '&amp;amp;stream=' . $stream, 'text/html', array( 'class' => $class ) );
		$xhtml .= '<!--' . "\n" . '<!--[if IE]>-->';
		$xhtml .= '';
		$xhtml .= '';

		return $xhtml;
	}
}

As the class is within my own library, and as I have the following in my application/configs/application.ini file:

resources.view.helperPath = "Gamajo/View/Helper/"
resources.view.helperPathPrefix = "Gamajo_View_Helper_"

… then as per the comments in the class file, usage in a view script or layout is as simple as:

<?= $this->facebookFanPage(140949818337, array('stream'=>'0')); ?>

I’m sure there’s probably better ways of adding this view helper, and I’d be interested to hear your comments!