Facebook app to post to a page

Hello,

I want to post automatically to my Facebook page, but not to my personal account. What's the difference in coding?

It's linked to my personal account perfectly using the following code:

<?php require_once($root.'includes/facebook_api/facebook.php');
$config = array();
  $config['appId'] = 'whatever';
  $config['secret'] = 'shh. It's a secret';
  $config['fileUpload'] = false; // optional

  $facebook = new Facebook($config);

$user = $facebook->getUser(); // Get the UID of the connected user, or 0 if the Facebook user is not connected.

if($user == 0) {

    $login_url = $facebook->getLoginUrl($params = array('scope' => "publish_stream"));

    echo ("<script> top.location.href='".$login_url."'</script>");

} else {

    try {
            $params = array(
                'message'       =>  "I'm trialing a new post-to-facebook app. Just ignore me.",
                'name'          =>  "Ending Today",
                'caption'       =>  "Get them while they're hot... ",
                'description'   =>  "Pre-owned listings on Truro.com ending today. They will disappear in less than 24 hours, get them now!",
                'link'          =>  "http://www.truro.com/pre-owned_ending_today.php",
                'picture'       =>  "http://www.truro.com/furniture/logo.jpg",
            );

            $post = $facebook->api("/$user/feed","POST",$params);

            $go=$root.'cron_jobs/check_backlink_ncj.php';
			header( 'Location: '.$go ) ;
			die();
        }
        catch (FacebookApiException $e) {
           $result = $e->getResult();
        }

}
?>

but I want it to post to my business page instead.

Suggestions, please?

Neil