PHP获取MSN好友列表类的实现代码

代码如下:
<?php
error_reporting(7);
class msn
{
    private $startcomm = 0;
    private $username = '';
    private $password = '';
    private $commend = '';
    private $domain = '';
    private $socket = '';
    private $challenge = '';
    private $status = array();
    private $data = array();

    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)) {