微信授权登陆获取用户信息

根据微信api和自己实际项目开发；

 public function getuserinfo()
    {
        if (isset($_GET['code'])) {
            //获取access_token  openid  refresh_token
            $url1 = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid=' . $this->appid . '&secret=' . $this->secret . '&code=' . $_GET['code'] . '&grant_type=authorization_code';
            $result_access_token = $this->http_curl($url1); //主要返回取access_token 和 openid
            $arr = json_decode($result_access_token, true); //数组
            //验证access_token是否有效
            $url_fresh_verification = 'https://api.weixin.qq.com/sns/auth?access_token=' . $arr['access_token'] . '&openid=' . $arr['openid'] . '';
            $refresh_token_istrue = $this->http_curl($url_fresh_verification);
            $refresh_token_istrue = json_decode($refresh_token_istrue, true);
            if ($refresh_token_istrue['errcode'] != 0) {
                //3.0 重新刷新access_token
                $url_get_new_access_token = 'https://api.weixin.qq.com/sns/oauth2/refresh_token?appid=wxeb8d4ef8686310eb&grant_type=refresh_token&refresh_token=' . $arr['refresh_token'] . '';
                $new_access_token = $this->http_curl($url_get_new_access_token);
                $obj = json_decode($new_access_token);
                //重新取得access_token
                $arr['access_token'] = $obj->access_token;
            }
            // 获取用户信息
            if (count($arr) > 2) {
                $url_userinfo = 'https://api.weixin.qq.com/sns/userinfo?access_token=' . $arr['access_token'] . '&openid=' . $arr['openid'] . '&lang=zh_CN';
                $result_userinfo = $this->http_curl($url_userinfo);
                //dump(json_decode($result_userinfo,true));
            } else {
                echo json_encode($arr);
            }
        } else {
            echo "授权失败";
        }
    }

curl会话机制执行url

public function http_curl($url){
    $ch=curl_init();//开启会话机制
    curl_setopt($ch,CURLOPT_URL,$url);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); //获取数据返回
    curl_setopt($ch,CURLOPT_BINARYTRANSFER,true); //启用
    $result=curl_exec($ch); //执行
    curl_close($ch); //关闭会话机制
    return json_decode($result,true); //true 返回数组，默认返回对象
}