Modified version of the Whois class.

1, simplified the code. (It actually removes some of the variables that you don't need to define)
2, for the information retrieved from the InterNIC is too simple, according to InterNIC feedback in the information of WHOIS server for further inquiries. Yahoo, for example, has more detailed information on the whois.networksolutions.com.

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Class Whois {

var $use _cache = 1;
var $FROM _cache=0;
var $cache _dir = "./"; Set it up according to your system.

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

If you want to try again automatically after the connection fails,
Set the number of retries $MAX _retries
var $MAX _retries = 0;
var $SLEEP _val = 1;
var $RETRY = 0;

var $FOUND = 0; Query has no results, the secondary value is 0
var $ERROR = 0; Number of errors during query
var $DATA _min = 8; We should get at least 8 bytes of data
var $DATA _count = 0;

var $WHOIS _server;
var $NEW _whois;
var $FURTHER _info = 0;


Open the socket connection to the WHOIS server
The default is 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;
}

Get a simple query result and put the array in the behavior unit
International Domain name Inquiry
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]):
$this->new_whois=trim (Trim ($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
}


Domestic domain Search
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. $domainname;
Select Whois SERVER according to domestic domain name or international domain name
if (Ereg (". cn$", $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 "

echo "<table>";
$x = 0;
while ($x <count ($array))
{
echo "<tr><td> $x </td>";
echo "<td> $array [$x]</td>";
$x + +;
}
echo "</table>";

if (!ereg (". cn$", $thisname))
{
echo "

$array _further= $myWHOIS->rawlookup ($thisname, $myWHOIS->new_whois);

echo "<table>";
$x = 0;
while ($x <count ($array _further))
{
echo "<tr><td> $x </td>";
echo "<td> $array _further[$x]</td>";
$x + +;
}
echo "</table>";
}

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