private static function doBlock($action = '')
{
if (!defined('SEMALT_UNIT_TESTING')) {
self::cls();
}
self::blockAction($action);
echo sprintf(self::$explanation, self::getHttpReferer(), 'https://www.google.com/#q=' . urlencode(preg_replace('/https?:\\/\\//', '', self::getHttpReferer()) . ' referral spam'));
}