微信支付报错：统一下单和拉起支付的appid不一致(原创)

    public function get_prepay_package($prepay_id) {
        $data = array();
        //微信开放平台审核通过的应用APPID
$data["appId"] = $this->_config["appid"];
        //微信支付分配的商户号
        $data["partnerid"] = $this->_config["mch_id"];
        //预支付交易会话ID
        $data["prepayid"] = $prepay_id;
        //暂填写固定值Sign=WXPay
        $data["package"] = "WXPay";
        //随机字符串，不长于32位
        $data["noncestr"] = $this->get_nonce_string();
        //时间戳
$data["timeStamp"] = time();
        $data["sign"]   = $this->sign($data);
        return $data;
    }