<?   //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>";     }     ?>