cost

@@ -50,8 +50,8 @@ class AdminCostController extends AdminBaseController{
             'update_time' => time()
         ];
         $interval=[
-            'start_time' => $param['start_time'],
-            'end_time' =>$param['end_time'],
+            'start_time' => strtotime($param['start_time']),
+            'end_time' => strtotime($param['end_time']),
             'price' => $param['price'],
             'update_time' => time()
         ];