PHP写的域名查询系统Whois

               
<?php
if ($domain) {
    if ($domain) {
        $fp = fsockopen("rs.internic.net", 43, &$errno, &$errstr, 10);
        if (!$fp) {
            echo "$errstr ($errno)<br>n";
        } else {
            fputs($fp, "$domainrn");
            while (!feof($fp)) {
                $buf = fgets($fp, 128);
                if (ereg("Whois Server:", $buf)) {
                    $server = str_replace("Whois Server: ", "", $buf);
                    $server = trim($server);
                }
            }
            fclose($fp);
        }
        if ($server) {
            echo "<B>$domain is registered at $server:</B><BR>";
            echo "<PRE>";
            $fp = fsockopen($server, 43, &$errno, &$errstr, 10);
            if (!$fp) {
                echo "Could not open connection to $server on port 43.n";
                echo "$errstr ($errno)<br>n";
            } else {
                fputs($fp, "$domainrn");
                while (!feof($fp)) {
                    echo fgets($fp, 128);
                }
                fclose($fp);
            }
        } else {
            echo ("<b>$domain does not appear to be registered.</b><BR>");
        }
        echo ("

"); } } ?>

查找 .com, .org, and .net 主机
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随意转载^^但请附上教程地址。