[更新]增加app支付参数获取

WeChat/Pay.php

@@ -55,6 +55,17 @@ class Pay extends BasicWePay
         return $pay->jsapiParams($prepay_id);
     }
 
+    /**
+     * 获取APP支付参数
+     * @param string $prepay_id 统一下单预支付码
+     * @return array
+     */
+    public function createParamsForApp($prepay_id)
+    {
+        $pay = new Order($this->config->get());
+        return $pay->appParams($prepay_id);
+    }
+
     /**
      * 获取支付规则二维码
      * @param string $product_id 商户定义的商品id 或者订单号

WePay/Order.php

@@ -100,6 +100,25 @@ class Order extends BasicWePay
         return "weixin://wxpay/bizpayurl?" . http_build_query($data);
     }
 
+    /**
+     * 获取微信App支付秘需参数
+     * @param string $prepayId 统一下单预支付码
+     * @return array
+     */
+    public function appParams($prepayId)
+    {
+        $data = [
+            'appid'      => $this->config->get('appid'),
+            'partnerid'  => $this->config->get('mch_id'),
+            'prepayid'   => (string)$prepayId,
+            'package'    => 'Sign=WXPay',
+            'time_stamp' => (string)time(),
+            'nonce_str'  => Tools::createNoncestr(),
+        ];
+        $data['sign'] = $this->getPaySign($data, 'MD5');
+        return $data;
+    }
+
     /**
      * 刷卡支付 撤销订单
      * @param array $options