(转载)分享一个昨天写的，3GQQ登录及取回sid的php源代码，内涵post/get访问网页的源代码。

<?php
//3gQQ登录，1qq，2密码，3返回sid，4返回验证码地址。
function qqlogin($qq,$mm,&$returnsid,&$yzmurl){
        $ym=get('http://pt.3g.qq.com/g/s?aid=nLogin');
        $sid=text_midtext($ym,'sid=','&');
        $vdata=text_midtext($ym,'?vdata=','"');
        $submitarr=array(                
                'login_url'=> 'http%3A%2F%2Fpt.3g.qq.com%2Fs%3Faid%3DnLogin',
                'q_from'=> '',
                'loginTitle'=> '%E6%89%8B%E6%9C%BA%E8%85%BE%E8%AE%AF%E7%BD%91',
                'bid'=> '0',
                'qq'=> $qq,
                'pwd'=> $mm,
                'loginType'=> '1',
                'loginsubmit'=> '%E7%99%BB%E5%BD%95',
        );
        $submiturl='http://pt.3g.qq.com/handleLogin?sid='.$sid.'&vdata='.$vdata;
        $submitdata=http_build_query($submitarr);
        //echo $submitdata;
        global $loginym;
        $loginym=mb_convert_encoding(post($submiturl,$submitdata,''),'GBK','UTF-8');//腾讯的服务器是UTF-8编码。
        $yz=strpos($loginym,'登录成功');
        $yz2=strpos($loginym,'登录密码错误');
        $yz3=strpos($loginym,'输入验证码');
        if($yz!=false){
                $returnsid=text_midtext($loginym,'sid=','&');
                return 1;//登录成功
        }elseif($yz2!=false){
                return 2;//密码错误
        }elseif($yz3!=false){
                $yzmurl=text_midtext($loginym,'<img src="','"');
                return 3;//验证码
        }else{
                
                return $loginym;//都不是的话 就返回源码 看看原因
        }
}

//取出中间文本,1全文本，2左边文本，3右边文本
function text_midtext ($str,$left,$right){
        $a = explode($left,$str);
        $sz2 = $a[1];
        $sz1 = explode($right,$sz2);
        return $sz1[0];
}


//post访问网页，1post地址，2post数据,3cookie  服务器需要curl的zhi'c
function post($str1,$str2,$cookie){
        $ch=curl_init();
        curl_setopt($ch,CURLOPT_URL,$str1);
        curl_setopt($ch,CURLOPT_HEADER,1);
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
        curl_setopt($ch,CURLOPT_COOKIEJAR,$cookie);
        curl_setopt($ch,CURLOPT_POST,1);
        curl_setopt($ch,CURLOPT_POSTFIELDS,$str2);
        $data=curl_exec($ch);
        curl_close($ch);
        return $data;
}


//get网页访问，返回源码
function get($url){
        $url = eregi_replace('^http://', '', $url);
        $temp = explode('/', $url);
        $host = array_shift($temp);
        $path = '/'.implode('/', $temp);
        $temp = explode(':', $host);
        $host = $temp[0];
        $port = isset($temp[1]) ? $temp[1] : 80;
        $fp = @fsockopen($host, $port, &$errno, &$errstr, 30);
        if ($fp){
                @fputs($fp, "GET $path HTTP/1.1\r\n");
                @fputs($fp, "Host: $host\r\n");
                @fputs($fp, "Accept: */*\r\n");
                @fputs($fp, "Referer: http://$host/\r\n");
                @fputs($fp, "User-Agent: TTMobile/09.03.18/symbianOS9.1 Series60/3.0 Nokia6120cAP3.03\r\n");
                @fputs($fp, "Connection: Close\r\n\r\n");
        }
        $Content = '';
        while ($str = @fread($fp, 4096))
        $Content .= $str;
        @fclose($fp);
        return $Content;
}
?>