PHP实现网站应用微信登录功能详解

  /**
   * 根据用户已获得的 openID 获取其他信息 （主要为 unionID）
   */
  public function getUnionidByOpenid($openID = ''){
    $url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token="
      .$this->getaccesstoken()
      ."&openid=".$openID."&lang=zh_CN";
    $jsonRes = $this->http_get($url);
    if ($jsonRes){
      $arrRes = json_decode($jsonRes, true);
      return $arrRes['unionid'];
    }else{
      return '';
    }
  }

'WEIXIN_LOGIN' => array(
    // 微信开放平台 使用微信帐号登录App或者网站 配置信息
    'OPEN_APPID' => 'wxbd961b2a6b7b2963', //应用　AppID
    'OPEN_APPSECRET' => 'e6xxxxxxxxxxxxxxxxxxxxe90',//应用 AppSecret
    'OPEN_CALLBACKURL' => 'http://www.52zhenmi.com/Home/Login/wxBack', //微信用户使用微信扫描二维码并且确认登录后，PC端跳转路径
  ),

public function wxIndex(){
    //--微信登录-----生成唯一随机串防CSRF攻击
    $state = md5(uniqid(rand(), TRUE));
    $_SESSION["wx_state"]  =  $state; //存到SESSION
    $callback = urlencode($this->callBackUrl);
    'https://https://blog.csdn.net/u011415782/article/details/open.weixin.qq.com/connect/qrconnect?appid=APPID&redirect_uri=REDIRECT_URI&response_type=code&scope=SCOPE&state=STATE#wechat_redirect';
    $wxurl = "https://https://blog.csdn.net/u011415782/article/details/open.weixin.qq.com/connect/qrconnect?appid="
        .$this->appID."&redirect_uri="
        .$callback."&response_type=code&scope=snsapi_login&state="
        .$state."#wechat_redirect";
    header("Location: $wxurl");
  }

  public function wxBack(){
    if($_GET['state']!=$_SESSION["wx_state"]){
      echo 'sorry,网络请求失败...';
      exit("5001");
    }
    $url='https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$this->appID.'&secret='.$this->appSecret.'&code='.$_GET['code'].'&grant_type=authorization_code';
    $arr = curl_get_contents($url);
    //得到 access_token 与 openid
    $url='https://api.weixin.qq.com/sns/userinfo?access_token='.$arr['access_token'].'&openid='.$arr['openid'].'&lang=zh_CN';
    $user_info = curl_get_contents($url);
    $this->dealWithWxLogin($user_info);
  }

  /**
   * 根据微信授权用户的信息 进行下一步的梳理
   * @param $user_info
   */
  public function dealWithWxLogin($user_info){
    //TODO 数据处理
    var_dump($user_info);
    die;
  }