diff --git a/webapp/controller/ActivityController.class.php b/webapp/controller/ActivityController.class.php
index cf2ebda..563241b 100644
--- a/webapp/controller/ActivityController.class.php
+++ b/webapp/controller/ActivityController.class.php
@@ -442,18 +442,18 @@ class ActivityController{
         }
 
         if ($cur_cost > 0) {
-            $row = $conn->execQueryOne(
+            $userrow = $conn->execQueryOne(
                 'SELECT diamond_num, first_gift, free_coin, free_diamond FROM user WHERE accountid=:accountid;',
                 array(
                     ':accountid' => $account_id
                 )
             );
-            if (!$row) {
+            if (!$userrow) {
                 phpcommon\sendError(ERR_USER_BASE + 1, '没有这个玩家');
                 return;
             }
             //扣除钻石
-            if ($row['diamond_num'] < $cur_cost) {
+            if ($userrow['diamond_num'] < $cur_cost) {
                 phpcommon\sendError(ERR_USER_BASE + 3, '钻石不足');
                 return;
             }