使用微信小程序轻松快捷地完成扫码登录

    /**
     * 获取不受限制的小程序二维码
     *
     * @param $page string 页面路径
     * @param $scene string 携带参数
     * @param $width int 宽度
     * @param $color array 颜色
     * @param $isHyaline boolean 是否透明底色
     * @return string
     *
     * @throws Exception
     */
    public function unlimitedAcode(string $scene, string $page='', int $width=50, array $color=[], bool $isHyaline=false)
    {
        $url = 'https://api.weixin.qq.com/wxa/getwxacodeunlimit';
        $query = [
          'access_token' => $this->accessToken()
        ];

        $data = [
            'scene' => $scene,
            'width' => $width,
            'auto_color' => $color ? false : true,
            'is_hyaline' => $isHyaline
        ];
        if ($page) {
            $data['page'] = $page;
        }
        if (!$data['auto_color']) {
            $data['line_color'] = [
                'r' => $color[0],
                'g' => $color[1],
                'b' => $color[2]
            ];
        }

        $client = new Client([
            'query' => $query,
            'body' => json_encode($data)
        ]);
        $res = $client->post($url);
        return $res->getBody()->getContents();
    }

/**
     * 用于用户绑定小程序的二维码
     * get: /users/ianzhi/wechat?mp=aaa
     * @param Request $request
     * @return ResponseFactory|Response
     * @throws Exception
     */
    public function wechatQrcode(Request $request)
    {
        $mp = $request->mp;
        $token = md5($mp . $request->user()->name . time() . uniqid());
        cache([$token => ['mp' => $mp]], Carbon::now()->addMinutes(5));
        return response($mp->unlimitedQrcode($token, 'pages/weblogin/weblogin'))
            ->withHeaders([ 'content-type'=> 'image/png' ]);
    }