order

@@ -36,10 +36,8 @@ class AdminStatisticsController extends AdminBaseController{
         dump($week);
 
         $month=array();
-        $start_month="";
-        $end_month="";
         for ($i = 0; $i <= 24; $i++){
-            $month[24-$i]=date('Y-m-d',strtotime(date('Y-m-1',strtotime("-$i Month"))));
+            $month[24-$i]=strtotime(date('Y-m-1',strtotime("-$i Month")));
         }
         dump($month);