统计

@@ -259,7 +259,7 @@ class Home extends Base {
             $where['_'][] = '`udate` <= '.$end_time;
         }
 
-        $where['_'] = implode(' and ',$where['_']);
+        $where['_'] && $where['_'] = implode(' and ',$where['_']);
 
         $where['folder_id'] = [];