小程序静默登录获取code和openid

uni端

// 静默登录
wx.login({
	success (res) {
		uni.request({
			url: ts.$tools.path+"/api/jiexi/openid",
			method: "post",
			data: {
				code:res.code
			},
			success: function (e) {
				console.log(e)
			}
		})
	}
})

php端

public function JiexiOpenid () {

    $param = $this->request->param();

    $code = $param["code"];

    $appid = "xxx";
    $secret = "xxx";

    $res = getCurl("https://api.weixin.qq.com/sns/jscode2session?appid={$appid}&secret={$secret}&js_code={$code}&grant_type=authorization_code");

    $openid = $res["openid"];

    return $openid;

}