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WHOIS类的修改版。

类别: PHP教程

1、简化了代码。（其实就是去掉了一些用不着的变量的定义）
2、针对从INTERNIC检索到的信息过于简单，根据INTERNIC反馈的信息中的WHOIS SERVER进行进一步查询。比如，YAHOO在whois.networksolutions.com上有更详细的信息。

<?
class whois {

var $use_cache = 1;
var $FROM_CACHE=0;
var $cache_dir = "./";            // 根据你的系统自己设置

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

// 如果你想在连接失败后自动重试，
// 设置重试次数 $MAX_RETRIES
var $MAX_RETRIES = 0;
var $SLEEP_VAL = 1;
var $RETRY = 0;

var $FOUND = 0;                // 查询没有结果，次值为0
var $ERROR = 0;                // 查询过程中的出错次数
var $DATA_MIN = 8;             // 我们至少应该获得8个字节的数据
var $DATA_COUNT = 0;

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

// 打开和WHOIS SERVER的SOCKET连接
// 默认的是 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;
        }

// 获取简单的查询结果，并以行为单位，放入数组
// 国际域名查询
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;
        }

// 国内域名查询
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.$domainname;
// 根据国内域名或国际域名选择WHOIS SERVER
if (ereg(".cn$",$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 "<h2 align=center>".$thisname."</h2>";
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 "<h2 align=center>Furth infomation</h2>";
    $array_further=$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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