PHP obtains the implementation code of MSN friend list class_PHP tutorial

    function set_account($username, $password)
    {
        $this->username = $username;
        $this->password = $password;
    }

    function getData(){
        $buffer="";
        while (!feof($this->socket)) {
            $buffer .= fread($this->socket,1024);
            if (preg_match("//r/",$buffer)) {
                break;
            }
        }
        $this->checkData($buffer);
    }

    function getData2() {
        $buffer="";
        while (!feof($this->socket)) {
            $buffer .= fread($this->socket,1024);
            if (preg_match("//r/n/r/n/",$buffer)) {
                break;
            }
        }
        $this->checkData($buffer);
    }
    function checkData($buffer) {
        if (preg_match("/lc/=(.+?)/Ui",$buffer,$matches)) {   
            $this->challenge = "lc=" . $matches[1];
        }
        if (preg_match("/(XFR 3 NS )([0-9/./:]+?) (.*) ([0-9/./:]+?)/is",$buffer,$matches)) {
            $split = explode(":",$matches[2]);
            $this->startcomm = 1;
            $this->msn_connect($split[0],$split[1]);
        }
        if (preg_match("/tpf/=([a-zA-Z0-9]+?)/Ui",$buffer,$matches)) {
            $this->nexus_connect($matches[1]);
        }
        $split = explode("/n",$buffer);
        for ($i=0;$i            $detail = explode(" ",$split[$i]);
            if ($detail[0] == "LST") {
                if(isset($detail[2])) $this->data[] = array($detail[1], urldecode($detail[2]));
            }
        }
        $this->status = array(200, $this->data);
        //echo $buffer;
    }
    function msn_connect($server,$port) {
        if ($this->socket) {
            fclose($this->socket);
        }
        $this->socket = @fsockopen($server,$port, $errno, $errstr, 20);
        if (!$this->socket) {
            $this->status = array(500,'MSN验证服务器无法连接');
            return false;

        }else {

            $this->startcomm++;
            $this->send_command("VER " . $this->startcomm . " MSNP8 CVR0",1);
            $this->send_command("CVR " . $this->startcomm . " 0x0409 win 4.10 i386 MSNMSGR 6.2 MSMSGS " . $this->username,1);
            $this->send_command("USR " . $this->startcomm . " TWN I " . $this->username,1);
        }
    }
    function send_command($command) {
        $this->commend = $command;
        $this->startcomm++;      
        fwrite($this->socket,$command . "/r/n");
        $this->getData();
    }
    function nexus_connect($tpf) {
        $arr[] = "GET /rdr/pprdr.asp HTTP/1.0/r/n/r/n";
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, "https://nexus.passport.com:443/rdr/pprdr.asp");
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_VERBOSE, 0);
        curl_setopt($curl, CURLOPT_HEADER,1);
        curl_setopt($curl, CURLOPT_HTTPHEADER, $arr);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        $data = curl_exec($curl);
        curl_close($curl);
        preg_match("/DALogin=(.+?),/",$data,$matches);
        if(!isset($matches[1])) return false;
        $split = explode("/",$matches[1]);
        $headers[0] = "GET /$split[1] HTTP/1.1/r/n";
        $headers[1] = "Authorization: Passport1.4 OrgVerb=GET,OrgURL=http%3A%2F%2Fmessenger%2Emsn%2Ecom,sign-in=" . $this->username . ",pwd=" . $this->password . ", " . trim($this->challenge) . "/r/n";
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, "https://" . $split[0] . ":443/". $split[1]);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_VERBOSE, 0);
        curl_setopt($curl,CURLOPT_FOLLOWLOCATION,1);
        curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($curl, CURLOPT_HEADER,1);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        $data = curl_exec($curl);
        curl_close($curl);
        preg_match("/t=(.+?)'/",$data,$matches);
        if(!isset($matches[1])){

            $this->status = array(404, '你输入的MSN帐号或者密码错误');
            return false;
        }
        $this->send_command("USR " . $this->startcomm . " TWN S t=" . trim($matches[1]) . "",2);
        $this->send_command("CHG " . $this->startcomm . " HDN",2);
        $this->send_command("SYN " . $this->startcomm . " 0",2);
        $this->getData2();
        $this->send_command("SYN " . $this->startcomm . " 1 46 2",2);
        $this->getData2();
        $this->send_command("CHG ". $this->startcomm . " BSY");
        $this->getData();    
    }
    public function getStatus()
    {
        return $this->status;
    }
}

$msn = new MSN;
$msn->set_account('xx@hotmail.com', 'xxxxx');
$msn->msn_connect("messenger.hotmail.com",1863);
$data = $msn->getStatus();
print_r($data);
?>