update wx group chat

application/services/wx/GroupChatService.php

@@ -46,8 +46,9 @@ class GroupChatService
             if (empty($result['group_chat_list'])) {
                 break;
             }
-            $existChatIds = $this->getWxGroupChatIds(array_column($result['group_chat_list'], 'chat_id'));
-            foreach ($result['group_chat_list'] as $group) {
+            $groupChatList = $result['group_chat_list'];
+            $existChatIds = $this->getWxGroupChatIds(array_column($groupChatList, 'chat_id'));
+            foreach ($groupChatList as $group) {
                 try {
                     $groupChat = $this->getGroupChatDetail($group['chat_id']);
                     $chatInfo = $this->getFormatGroupChat($group, $groupChat);