edit

lib/Wechat.php

@@ -55,6 +55,7 @@ class Wechat extends Core
 			# 下单信息
 			$order['time'] = time();
 			$order['order_id'] = $order_id;
+			unset($order['mch_id']);
 			$this->updateOrderParam($order_id, $order);
 			return $order;
 		} else {