function is_google() {

    if( eregi("Googlebot", $_SERVER['HTTP_USER_AGENT']) ) {
        $hostname = gethostbyaddr($_SERVER['REMOTE_ADDR']);
        if( eregi("googlebot.com", $hostname) )
            return true;
        else
            return false;
        
    } else {
        return false;

    }

}

if(eregi('Google',$_SERVER['HTTP_USER_AGENT'])  $context['user']['is_logged'])
echo' ';
else
is_not_guest();