function is_search_engine()
{
    $useragent = $_SERVER['HTTP_USER_AGENT'];
    if ((stristr($useragent, "Fast")) || 
        (stristr($useragent, "Slurp")) || 
        (stristr($useragent, "Ink")) ||
        (stristr($useragent, "Atomz")) ||
        (stristr($useragent, "Scooter")) ||
        (stristr($useragent, "Crawler")) ||
        (stristr($useragent, "bot")) ||
        (stristr($useragent, "Genius")) ||
        (stristr($useragent, "AbachoBOT")) ||
        (stristr($useragent, "AESOP_com_SpiderMan")) ||
        (stristr($useragent, "ia_archiver")) ||
        (stristr($useragent, "Googlebot")) ||
        (stristr($useragent, "UltraSeek")) ||
        (stristr($useragent, "Google")))
    {
        return TRUE;
    }
    else
    {
        return FALSE;
    }
}