Php做的端口嗅探器--可以指定网站和端口

<?
  //php做的端口嗅探器--可以指定网站和端口
//并返回嗅探结果
    function http_request($server, $port) {
    $data = "";
    $query = "head / http/1.0";
    $fp = fsockopen($server, $port);
    if($fp) {
    fputs($fp, $query."rnn");
    while(!feof($fp)) {
    $data .= fread($fp, 1000);
    }
    fclose($fp);
    }
    return $data;
    }
    ?>
    <form>
    <input type=hidden name=action value=query>
    site: <input type=text name=server value="<?echo $server?>"> <small>(ie: www.wackowoh.com)</small><br>
    port: <input type=text name=port value="80" size="5" maxlength="5"><br>
    <input type=submit value=" ok ">
    </form>
    <?
    if($action == "query") {
    $data = http_request($server, $port);
    echo "connected to $server on port $port.<p>";
    echo "output: <p><pre>$data</pre><p>";
    }
    ?>