修改

center/controllers/user.php

@@ -2000,7 +2000,7 @@ class User extends MY_Controller
         }
         // 优惠券字段
         if ( $couponRes['result'] == 1 ) {
-            $orderData['coupon_name'] = isset( $couponRes['data']['name'] ) ? mb_convert_encoding($couponRes['data']['name'],'utf-8','gbk') : 0;
+            $orderData['coupon_name'] = isset( $couponRes['data']['name'] ) ? iconv('utf-8','gbk',$couponRes['data']['name']) : 0;
             $orderData['coupon_price'] = isset( $couponRes['data']['price'] ) ? $couponRes['data']['price'] : 0;
             $orderData['coupon_id'] = isset( $couponRes['data']['id'] ) ? $couponRes['data']['id'] : 0;
         }