php 小程序授权跟获取unionID

最新推荐文章于 2021-03-10 11:37:58 发布

八块腹肌的吴森丶

最新推荐文章于 2021-03-10 11:37:58 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/weixin_44186305/article/details/88641189

	 public function weixinlogin()
	
    {  
       //接收前端传过来的code 偏移量
        $get = I('get.');
        // var_dump($get);exit;
        //获取session_key
        $params['appid']= C("appid");
        $params['secret']= C("secret");
        $params['js_code']= define_str_replace($get['code']);
        $params['grant_type']= 'authorization_code';
        $http_key = curl_post_contents('https://api.weixin.qq.com/sns/jscode2session', $params, 'GET');
        $session_key = json_decode($http_key,true);
        // var_dump($session_key);exit;
        if(!empty($session_key['session_key'])){
            $openid=$session_key['openid'];
            $encryptedData= urldecode($get['encryptedData']);
            $iv = define_str_replace($get['iv']);
            $errCode = decryptData($params['appid'],$session_key['session_key'],$encryptedData,$iv);//获取unioID
            $unioId=$errCode['unionId']; //打印获取的数据
            //查询数据库
             $userinfo= getUserinfo($openid);
             //判断数据库中是否有该用户的数据
            if(!$userinfo){
              //如果没有就添加
                $insertInfo['openid'] = $openid;
                $insertInfo['nickname'] = $get['nickname'];
                $insertInfo['face'] = $get['face'];
                $insertInfo['unionid'] = $unioId;
                $insertInfo['sex'] = $get['sex'];
                $insertInfo['addtime'] = date("Y-m-d H:i:s",time());
                $insertInfo['updatetime'] = date("Y-m-d H:i:s",time());
                $res = M("wxinfo")->add($insertInfo);
            }else{
              //否则就修改最后登入时间
              $where['openid']=$openid;
              $updatetime['updatetime'] = date("Y-m-d H:i:s",time());
              M("wxinfo")->where($where)->save($updatetime);
            }
            session("openid",$openid);
            $encryption  = array("openid"=>$openid,'unionid'=>$unioId,"session_key"=>$session_key['session_key']);
            $session3rd = session_3rd();
            $data['session3rd'] = $session3rd;
             S($session3rd,$encryption);
             $this->ajaxReturn(array('status'=>200,'data'=>array("token"=>$session3rd)));
        }else{
            // echo '获取session_key失败！';
            $this->ajaxReturn(array('status'=>400,'data'=>array("msg"=>"获取session_key失败！")));
        }
    }

方法

//获取unionID

function decryptData( $appid , $sessionKey, $encryptedData, $iv ){

    $OK = 0;
    $IllegalAesKey = -41001;
    $IllegalIv = -41002;
    $IllegalBuffer = -41003;
    $DecodeBase64Error = -41004;
 
    if (strlen($sessionKey) != 24) {
        return $IllegalAesKey;
    }
    // $str = base64_decode(str_replace(" ","+",$_GET['str']));
    $aesKey=base64_decode(str_replace(" ","+",$sessionKey));
    // var_dump($aesKey);exit;
    if (strlen($iv) != 24) {
        return $IllegalIv;
    }
    $aesIV=base64_decode(str_replace(" ","+",$iv));
    $aesCipher=base64_decode(str_replace(" ","+",$encryptedData));
    $result=openssl_decrypt( $aesCipher, "AES-128-CBC", $aesKey, 1, $aesIV);
    $dataObj=json_decode( $result );
    // var_dump($dataObj);exit;
    if( $dataObj  == NULL )
    {
        return $IllegalBuffer;
    }
    if( $dataObj->watermark->appid != $appid )
    {
        return $DecodeBase64Error;
    }
    $data = json_decode($result,true);
 
    return $data;
}

//session_3rd();

function session_3rd($length = 16) {
     //生成第三方3rd_session
    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    $str = "";
    for ($i = 0; $i < $length; $i++) {
      $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
    }
    return $str;

}

//define_str_replace

function define_str_replace($data)
{
    return str_replace(' ','+',$data);
}