OpenID Over SSL with self signed certificate

// Redirect OpenID authentication requests to https:// of same URL
// Assuming valid OpenID operation over GET
if (!isset($_SERVER['HTTPS']) &&
        ($_GET['openid_mode'] == 'checkid_immediate' ||
         $_GET['openid_mode'] == 'checkid_setup'))
    http_redirect("https://{$_SERVER['HTTP_HOST']}{$_SERVER['REQUEST_URI']}");