ok. ho capito il problema. non posso effettuare un else if perche in entrambi i risultati lo script whois da le info. se disponibile lo script carica le info dal nic dicendo che il dominio è disponibile mentre se occupato mi da il whois. in questo modo non posso differenziare else if. ho visto il codice che sto utilizzando ho notato che il codice in questo caso php mi da il seguente risultato
var $STAT = array(-1=>"error",0=>"ready",1=>"ok");
se risco a riportare queste impostazioni sulla pagina sample1.php posso risolvere il problema
la pagina sample ho in include su main.whois
:::::::::::::::::::::::::::::::::::::::::::::
<?
if(isSet($query)) {
include("main.whois");
$whois = new Whois($query);
$result = $whois->Lookup();
echo "Risultato per il dominio $query :

";
if(isSet($whois->Query["errstr"])) {
echo "Errors:
".implode($whois->Query["errstr"],"<");
}
if($output=="object") {
include("utils.whois");
$utils = new utils;
$utils->showObject($result);
} else {
if(!empty($result["rawdata"])) {
echo implode($result["rawdata"],"\n");
} else { echo ""; }
}
}
?>

:::::::::::::::::::::::::::::::::::::::::::::::::: :
vi inserisco anche il main.whois

:::::::::::::::::::::::::::::::::::::::::::::::::: ::
<?
/*
Whois2.php PHP classes to conduct whois queries

Copyright (C)1999,2000 easyDNS Technologies Inc. & Mark Jeftovic

Maintained by Mark Jeftovic <markjr@easydns.com>

For the most recent version of this package:

http://www.easydns.com/~markjr/whois2/

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

/* main.whois 2.2-3 mark jeftovic 2000/08/07 */

class Whois {

var $VERSION;
var $CODE_VERSION = "2.2-3";
var $NSI_REGISTRY = "whois.nsiregistry.net";
var $NSI_REGISTRAR = "whois.networksolutions.com";
var $PORT = 43;
var $RETRY = 0; // maximum number of retries on connect
var $SLEEP = 2;
var $BUFFER = 0; // read buffer size, 0 means char by char

var $STAT = array(-1=>"error",0=>"ready",1=>"ok");

var $Query = array(
"tld"=>"",
"type"=>"domain",
"string"=>"",
"status",
"server"
);

#
# these are hacks. In a perfect world we don't need these
# but here we are nonetheless...
#
var $HACKS = array(
"nsi_force_dom"=>1, # force "dom" keyword
"nsi_referral_loop"=>0, # set if nsiregistry gives wrong whois server for netsol
"wrong_netsol_whois"=> "rs.internic.net",
"real_netsol_whois"=> "whois.networksolutions.com",
"cx_is_broken"=>1 # whois.nic.cx hangs forever
);

#
# $DATA is our list of servers and handlers as listed in servers.whois
#
var $DATA = array();

function Whois ($query="") {
require("servers.whois");
$this->VERSION=sprintf("Whois2.php v%s:%s", $this->CODE_VERSION,
$this->DATA_VERSION);
if(isSet($query)) {
$this->Query["string"]=strtolower($query);
$tld=$this->GetTld($this->Query["string"]);
if($tld) {
$this->Query["server"]=$this->DATA[$tld][0];
if(isSet($this->DATA[$tld][1])) {
$handler=$this->DATA[$tld][1];
$this->Query["file"]=sprintf("%s.whois",$handler);
$this->Query["handler"]=$handler;
}
$this->Query["tld"]=$tld;
} else {
$this->Query["status"]=-1;
$this->Query["errstr"][]=$this->Query["string"].
" domain is not supported";
unset($this->Query["server"]);
}
} else {
$this->Query["server"]=$this->NSI_REGISTRY;
}

}


// open a socket to the whois server
// defaults to whois.internic.net if an alternate is not passed
// returns: a pointer on success, sets $this->ERROR on fail
function Connect () {
if(!isSet($this->Query["server"])) { return(-1); }
$server = $this->Query["server"];
$retry = 0;
while($retry <= $this->RETRY):
$this->$Query["status"]="ready";
$ptr = fsockopen($server, $this->PORT);
if($ptr>0):
$this->$Query["status"]="ok";
return($ptr);
else:
$this->$Query["status"]="error";
$retry++;
sleep($this->SLEEP);
endif;
endwhile;
return(-1);
}

function Process ($result) {
$old_val = error_reporting(OFF);
$HANDLER_FLAG = sprintf("__%s_HANDLER__", strtoupper($this->Query["handler"]));
if(!defined($HANDLER_FLAG)) { include($this->Query["file"]); }
error_reporting($old_val);
if(!defined($HANDLER_FLAG)) {
$this->Query["errstr"][]="Can't find ".$this->Query["tld"]." handler: ".$this->Query["file"];
} else {
$object = $this->Query["handler"];
$handler = new $object($result, $this->Query);
if(isSet($handler->Query["errstr"])) {
$this->Query["errstr"][]=$handler->Query["errstr"];
}

return($handler->result);
}

return($result);
}

function Lookup ($query="") {
$string = !empty($query) ? $query : $this->Query["string"];
if($this->HACKS["cx_is_broken"] && $this->Query["tld"]=="cx") {
$this->Query["errstr"][]=".cx doesn't work. Turn off HACKS[\"cx_is_broken\"] if ".$this->Query["server"]." finally got fixed.";
return("");
}
$ptr=$this->Connect();
if(empty($this->Query["server"])) { return(false); }
if($ptr!=-1){
if(($this->Query["server"]==$this->NSI_REGISTRY
|| $this->Query["server"]==$this->NSI_REGISTRAR)
&& $this->HACKS["nsi_force_dom"]) {
fputs($ptr, sprintf("dom %s\r\n", trim($string)));
} else {
fputs($ptr, sprintf("%s\r\n", trim($string)));
}
while(!feof($ptr)) {
if($this->BUFFER) {
$output[]=fgets($ptr, $this->BUFFER);
} else {
$r.=fgetc($ptr);
}
}

if(!$this->BUFFER) { $output = explode("\n", $r); }
unset($output[count($output)-1]);
if(isSet($this->result["rawdata"])) {
$result = $output;
} else {
$result["rawdata"] = $output;
}
if(isSet($this->DATA[$this->Query["tld"]][1])) {
$result = $this->Process($result);
}
return($result);
} else {
$this->Query["status"]=-1;
$this->Query["errstr"][]="Connect failed to: ".$this->Query["server"];
return(array());
}

}

function GetTld ($domain) {
// unfortunately the only reliable way to do this is
// to blow through the entire server/tld list
reset($this->DATA);
while(list($tld, $param)=each($this->DATA)) {
if(eregi("\.$tld$", $domain)) {
if(!empty($curr_match)) {
// FIXME: we assume we'll never support a 3rd
// level registry. If we do, this breaks.
$curr_match = strchr($tld,".") ?
$tld : $curr_match;
}
else { $curr_match = $tld; }
}
}
return($curr_match);
}

}


?>