update：转换null

app/controller/MerchantStatis.php

@@ -71,6 +71,7 @@ class MerchantStatis extends BaseController
             $result = MerchantStatisModel::getMerchantHistory($userInfo['merchant_id'], $filters);
             
             // 格式化数据
+            $result['rtp'] = is_null($result["rtp"]) ? $result["rtp"] : 0;
             $result['date_stage'] = implode(' ~ ', $filters);
             $result['game_profit'] = CommonUtils::convertBalance($result['game_profit'], false);
             $result['bet_amount'] = CommonUtils::convertBalance($result['bet_amount'], false);