wp: remove or add Wordpress Footer Credits

remove or add Wordpress Footer Credits, Benjamin Denis

//Remove Wordpress Footer Credits
function wpc_remove_footer_admin(){
  return '';
}
add_filter('admin_footer_text', 'wpc_remove_footer_admin');

//OR add your credits
function remove_footer_admin () {
    echo 'Powered by <a href="http://www.wordpress.org">WordPress</a> | Designed by <a href="http://mdemrs.com">MDEMRS</a></p>';
    }

    add_filter('admin_footer_text', 'remove_footer_admin');