1、簡(jiǎn)化了代碼。（其實(shí)就是去掉了一些用不著的變量的定義）
2、針對(duì)從INTERNIC檢索到的信息過(guò)于簡(jiǎn)單，根據(jù)INTERNIC反饋的信息中的WHOIS SERVER進(jìn)行進(jìn)一步查詢。比如，YAHOO在whois.networksolutions.com上有更詳細(xì)的信息。

class whois {  

var $use_cache = 1;  
var $FROM_CACHE=0;  
var $cache_dir = "./"; // 根據(jù)你的系統(tǒng)自己設(shè)置

var $port = 43;  
var $MAXLEN = 100;  

// 如果你想在連接失敗后自動(dòng)重試，
// 設(shè)置重試次數(shù) $MAX_RETRIES
var $MAX_RETRIES = 0;  
var $SLEEP_VAL = 1;  
var $RETRY = 0;  

var $FOUND = 0; // 查詢沒(méi)有結(jié)果，次值為0
var $ERROR = 0; // 查詢過(guò)程中的出錯(cuò)次數(shù)
var $DATA_MIN = 8; // 我們至少應(yīng)該獲得8個(gè)字節(jié)的數(shù)據(jù)
var $DATA_COUNT = 0;  

var $WHOIS_SERVER;
var $NEW_WHOIS;
var $FURTHER_INFO = 0;


// 打開和WHOIS SERVER的SOCKET連接
// 默認(rèn)的是 whois.internic.net  
function connect ($server) {
$this->RETRY=0;
while($this->RETRY <= $this->MAX_RETRIES):
$ptr = fsockopen($server, $this->port);  
if($ptr>0):  
$this->ERROR=0; // just in case we're on a retry  
return($ptr);  
else:  
$this->ERROR++;  
$this->RETRY++;  
sleep($this->SLEEP_VAL);  
endif;  
endwhile;  
}  

// 獲取簡(jiǎn)單的查詢結(jié)果，并以行為單位，放入數(shù)組
// 國(guó)際域名查詢
function rawlookup ($query, $server) {

if(!$query):  
return( "");  
endif;

$ptr=$this->connect($server);

if($ptr):  
if(!ereg($query, "n$")):  
$query .= "n";  
endif;  
fputs($ptr, "$query");  
$i=0;  
$this->FOUND=1;  
while(!feof($ptr)):  
$array[$i]=fgets($ptr,$this->MAXLEN);  
$this->DATA_COUNT+=strlen(chop($array[$i]));  
if(eregi( "No match for", $array[$i]) eregi ("No entries found", $array[$i])):  
$this->FOUND=0;  
elseif(eregi( "WHOIS database is down",$array[$i])):  
$this->ERROR++;  
$this->FOUND=0;  
elseif(eregi( "Please wait a while and try again",$array[$i])):  
$this->ERROR++;  
$this->FOUND=0;  
break;  
endif;  
if(eregi("Whois Server:",$array[$i])):
$this->NEW_WHOIS=trim(substr(trim($array[$i]),(strlen(trim($array[$i]))-13)*(-1)));
$this->FURTHER_INFO=1;
endif;
$i++;  
endwhile;  

fclose($ptr);  

if($this->DATA_COUNT>$this->DATA_MIN):
return($array);  
else:  
$this->ERROR++;  
endif;  
else:  
$this->ERROR++;  
endif;
}  


// 國(guó)內(nèi)域名查詢
function cnrawlookup ($query, $server) {  
if(!$query):  
return( "");  
endif;  

$ptr=$this->connect($server);  
if($ptr):  
if(!ereg($query, "n$")):  
$query .= "n";  
endif;  
fputs($ptr, "$query");  
$i=0;  
$this->FOUND=1;  
while(!feof($ptr)):  
$array[$i]=fgets($ptr,$this->MAXLEN);  
$this->DATA_COUNT+=strlen(chop($array[$i]));  
if(eregi( "No match for", $array[$i]) eregi ("No entries found", $array[$i])):  
$this->FOUND=0;  
elseif(eregi( "WHOIS database is down",$array[$i])):  
$this->ERROR++;  
$this->FOUND=0;  
elseif(eregi( "Please wait a while and try again",$array[$i])):  
$this->ERROR++;  
$this->FOUND=0;  
break;  
endif;  
$i++;  
endwhile;  
fclose($ptr);  

if($this->DATA_COUNT>$this->DATA_MIN):
return($array);  
else:  
$this->ERROR++;  
endif;  
else:  
$this->ERROR++;  
endif;  
}  
};



$myWHOIS=new whois();

$thisname=$servername.$domainname;
// 根據(jù)國(guó)內(nèi)域名或國(guó)際域名選擇WHOIS SERVER
if (ereg(".cn$",$thisname))
{
$myWHOIS->WHOIS_SERVER="whois.cnnic.net.cn";
$array=$myWHOIS->cnrawlookup($thisname,$myWHOIS->WHOIS_SERVER);
}
else
{
$myWHOIS->WHOIS_SERVER="whois.internic.net";
//$myWHOIS->WHOIS_SERVER="whois.networksolutions.com";
$array=$myWHOIS->rawlookup($thisname,$myWHOIS->WHOIS_SERVER);
}



echo "
".$thisname."
";
echo "";
$x=0;
while ($x {
echo " $x ";
echo " $array[$x] ";
$x++;
}
echo "  
";

if (!ereg(".cn$",$thisname))
{
echo "
Furth infomation
";
$array_further=$myWHOIS->rawlookup($thisname,$myWHOIS->NEW_WHOIS);

echo "";
$x=0;
while ($x {
echo " $x ";
echo " $array_further[$x] ";
$x++;
}
echo "  
";
}

?>