wp-vipergp shortcode

/* Shortcode for Guestbook */
function my_guestbook( $args ) {

    $defaults = array(
        'entriesPerPg' => 10,       //Number of entries to show per page
        'reverseOrder' => false,    //Show newest entries first
        'allowUploads' => true,     //Allow users to upload images
        'maxImgSizKb'  => 50,       //Max uploadable image size
        'showBrowsers' => true,     //Show visitor browser/OS icons
        'showFlags'    => true   //Show visitor flags (Requires Ozh IP2Nation)
    );

    $r = wp_parse_args( $args, $defaults );
    extract( $r, EXTR_SKIP );

    if ( function_exists('vgb_GetGuestbook') ) {
        return vgb_GetGuestbook( $r );
    } else {
        return 'The Guestbook is currently deactivated.';
    }
}
add_shortcode('guestbook', 'my_guestbook');