diff --git a/webapp/controller/RechargeController.class.php b/webapp/controller/RechargeController.class.php
index f14f442..67bcc64 100644
--- a/webapp/controller/RechargeController.class.php
+++ b/webapp/controller/RechargeController.class.php
@@ -514,7 +514,7 @@ class RechargeController
                 die();
             }
             $itemidlist = explode('|', $dropconf['item_id']);
-            $itemnumlist = explode('|', $dropconf['item_num']);
+            $itemnumlist = explode('|', $dropconf['num']);
             $item_list = array();
             foreach ($itemidlist as $key => $itemid) {
                 array_push($item_list, array(
@@ -548,7 +548,10 @@ class RechargeController
                     )
                 );
             } else {
-                $daily_purchase = json_decode($rechargerow['daily_purchase'], true);
+                $daily_purchase = array();
+                if ($rechargerow['daily_purchase'] != null && $rechargerow['daily_purchase'] != '') {
+                    json_decode($rechargerow['daily_purchase'], true);
+                }
                 $found = false;
                 foreach ($daily_purchase as $key => $dailyitem) {
                     if ($dailyitem['id'] == $_REQUEST['goodsid']) {