第三方登陆 ，微信扫码登陆

#微信扫码登陆  https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419316505&token=&lang=zh_CN
#授权接口      https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419316518&token=&lang=zh_CN
namespace Home\Controller;
use Think\Controller;
class WxLoginController extends Controller {

    //-------配置
    const AppID = 'wx897er6594e4f3d';
    const AppSecret = '22a872e9w0f0fbw932ff4fa7a33';
    const callback  =  'http://xxxxxxxxxx/index.php?s=/Home/WxLogin/callbackUrl.html'; //回调地址

    public function doLogin()
    {

        //微信登录
        session_start();
        //-------生成唯一随机串防CSRF攻击
        $state  = md5(uniqid(rand(), TRUE));
        $_SESSION["wx_state"]    =   $state; //存到SESSION
        $callback = urlencode(self::callback);
        $wxurl = "https://open.weixin.qq.com/connect/qrconnect?appid=".self::AppID."&redirect_uri={$callback}&response_type=code&scope=snsapi_login&state={$state}#wechat_redirect";
        echo $wxurl;die;

    }

    // 回调后授权调用接口
    public function callbackUrl()
    {

        if($_GET['state']!=$_SESSION["wx_state"])
        {
            exit("5001");
        }

        //获取 access_token 与 openid
        $url='https://api.weixin.qq.com/sns/oauth2/access_token?appid='.self::AppID.'&secret='.self::AppSecret.'&code='.$_GET['code'].'&grant_type=authorization_code';
        $arr = $this->curlRequest($url);


        //获取用户信息
        $userUrl='https://api.weixin.qq.com/sns/userinfo?access_token='.$arr['access_token'].'&openid='.$arr['openid'].'&lang=zh_CN';
        $userInfo = $this->curlRequest($userUrl);

        ##############################################################
        //print_r($arr);
        //print_r($userInfo);die;
        ##############################################################
        $this->VerifyUser($userInfo);


     }


     public function curlRequest($url)
     {

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch, CURLOPT_URL, $url);
        $json =  curl_exec($ch);
        curl_close($ch);
        $arr=json_decode($json,true);
        return $arr;

     }

     //验证用户
     public function VerifyUser($WxUserInfo)
     {
         //检测用户是否存在status=1 登陆成功
         $where = array('status'=>1,'wx_openid'=>$WxUserInfo['openid']);
         $userInfo = td_iconv(M('user')->where($where)->find());

         if (!empty($userInfo)) {
             session('userid',$userInfo['id']);
            session('groupid',$userInfo['groupid']);
            session('uname',$userInfo['wx_nickname']);

            $data['ip'] =  get_client_ip();
            $data['lasttime']=time();
            if(M("user")->where(array('id'=>$userInfo['id']))->save($data)){
                M("user")->where(array('id'=>$userInfo['id']))->setInc("loginnum");
            }

            $this->success("登录成功...",U("Index/index"));

         }else{
             $data = array(
                     'groupid'=>15,
                     'status'=>0,
                     'ip'=>get_client_ip(),
                    'dateline'=>$_SERVER['REQUEST_TIME'],
                    'loginnum'=>0,
                     'wx_openid'=>$WxUserInfo['openid'],
                     'wx_nickname'=>iconv('UTF-8','gbk',$WxUserInfo['nickname'])
                 );

              $res = M("user")->data($data)->add();

              //echo  M()->getLastSql();die;

              if (!empty($res)) {

                  echo "";

              }

         }


     }

}

<li>
<img src="__PUBLIC__/images/login/wx.png" alt="微信登录" style="width: 70px;height: 50px;cursor:pointer;" onclick="wxLogin()">
li>

<script type="text/javascript">
    function wxLogin()
    {
        $.get("{:U('WxLogin/doLogin')}",function(msg){
            if(msg!=''){

             window.location.href=msg;
            }
        });
    }