php微信授权

使用PHP请求获取用户的信息,前后端分离getCode方法前端使用获取code

appId = '你的微信appid';  
       $this->appSecret= '你的微信appSecret';  
    }

    public function index()
    {
        return 'index';
    }

    //获取code
//1、以snsapi_base为scope发起的网页授权,是用来获取进入页面的用户的openid的,并且是静默授权并自动跳转到回调页的。用户感知的就是直接进入了回调页(往往是业务页面)

//2、以snsapi_userinfo为scope发起的网页授权,是用来获取用户的基本信息的。但这种授权需要用户手动同意,并且由于用户同意过,所以无须关注,就可在授权后获取该用户的基本信息。
    public function getCode(){
        //scope=snsapi_base 实例
        $unique_id = $_GET["unique_id"];
        $appid = $this->appId;
        $redirect_uri = urlencode ('https://ticiapi.hdn.cn/index/index/getUserInfo?unique_id='.$unique_id);
        $url ="https://open.weixin.qq.com/connect/oauth2/authorize?appid=$appid&redirect_uri=$redirect_uri&response_type=code&scope=snsapi_base&state=1#wechat_redirect";
        header("Location:".$url);
    }

    //获取用户信息
    public function getUserInfo(){

        $appid = $this->appId;  
        $secret = $this->appSecret;  
        $code = $_GET["code"];
         
        //第一步:取全局access_token
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appid&secret=$secret";
        $token = $this->getJson($url);
         
        //第二步:取得openid
        $oauth2Url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=$appid&secret=$secret&code=$code&grant_type=authorization_code";
        $oauth2 = $this->getJson($oauth2Url);
          
        //第三步:根据全局access_token和openid查询用户信息  
        $access_token = $token["access_token"];  
        $openid = $oauth2['openid'];  
        $get_user_info_url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=$access_token&openid=$openid&lang=zh_CN";
        $userinfo = $this->getJson($get_user_info_url);
        
        var_dump($userinfo);

    }

    //请求
    public function getJson($url){
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); 
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); 
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($ch);
        curl_close($ch);
        return json_decode($output, true);
    }
  
}

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