优化管理后台查询

Application/Home/Controller/DownloadController.class.php

@@ -2061,8 +2061,8 @@ class DownloadController extends BaseController
                 $createTimeBegin = strtotime($createTimeRow[0] . ' 00:00:00');
                 $createTimeEnd = strtotime($createTimeRow[0] . ' 23:59:59');
             }
-            if (($createTimeEnd - $createTimeBegin) > 7*24*3600) {
-                $this->error('时间范围不能超过7天');
+            if (($createTimeEnd - $createTimeBegin) > 31*24*3600) {
+                $this->error('时间范围不能超过31天');
             }
             $map['create_time'] = ['between', [$createTimeBegin, $createTimeEnd]];
         }