($_GET['q'] == variable_get('site_frontpage', 'node'));

(strpos($_GET['q'], variable_get('site_frontpage', 'node')) !== false)

function drupal_is_front_page2() {
  $is_front_page = (strpos($_GET['q'], variable_get('site_frontpage', 'node')) !== false);
  return $is_front_page;
}