Colocar um favicon no wordpress

favicon.php

<?php
/*
Plugin Name: Adicionar favicon no blog
Plugin URI: http://www.ferramentasblog.com/2010/02/como-trocar-favicon-blogger-wordpress.html
Description: Adiciona facilmente um favicon no Wordpress
Version: 1.0
Author: Marcos Lemos, Claudio Sanches
Author URI: http://www.ferramentasblog.com/
*/

function childtheme_favicon() { ?>
<link rel="shortcut icon" href="LINK DA IMAGEM DO FAVICON" />
<?php }

add_action('wp_head', 'childtheme_favicon');

?>