WeChat パブリック アカウント開発に関するチュートリアル 4 を完了する

// 引导跳转的方式
public function auth($action_name, $controller_name)
{
//    var_dump($action_name, $controller_name);
$bak = urlencode("http://www.xiaoziheng.club/home/".$controller_name."/".$action_name);
$redirecr_uri =urlencode('http://www.xiaoziheng.club/home/demo/getcode?bak='.$bak);
$url ="https://open.weixin.qq.com/connect/oauth2/authorize?appid=".$this->appid."&redirect_uri="
           .$redirecr_uri."&response_type=code&scope=snsapi_userinfo&state=".time()."#wechat_redirect";
header('Location:'.$url);
}

public function __construct(Request $request)
{
parent::__construct();
$this->accessToken = get_access_token();
//获得方法    
$action_name =$request->action();
//获得控制器   
$controller_name = $request->controller();
if(!cookie('user')){
if($action_name !='getcode'){
$this->auth($action_name, $controller_name);
}
}
}

public function getcode(Request $request)
{
$code = $_GET['code'];
if(!$code){
echo '微信服务器故障';
exit;
}
// 第二步：通过code换取网页授权中的access_token
$url ="https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$this->appid."&secret=".$this->appsecret
                         ."&code=".$code."&grant_type=authorization_code";
$result =file_get_contents($url);
$result = json_decode($result,true);
if(!$result){
echo '微信服务器故障';
exit;
}
// 第三步：获取用户的基本信息，此操作仅限scope为snspai_userinfo
$url ="https://api.weixin.qq.com/sns/userinfo?access_token=".$result['access_token']."&openid="
                       .$result['openid']."&lang=zh_CN";
$result =file_get_contents($url);
$result = json_decode($result,true);
$userInfo = db('user')->where("openid","=",$result['openid'])->find();
if(!$userInfo){
echo '操作数据可以';
$data = [
'nickname' =>$result['nickname'] ,
'openid'=>$result['openid'],
'headimgurl'=>$result['headimgurl']
];
db('user')->insert($data);
$userInfo = $result;
}
// 第四步骤：跳转回跳转地址
$bak = $_GET['bak'];
cookie('user',$userInfo);
header('Location:'.$bak);
}