使用框架 get 自带的过滤参数

(cherry picked from commit 85271d1cf7729196926b03e428f999e9b13b6b08)

application/admin/controller/Addon.php

@@ -320,8 +320,7 @@ class Addon extends Backend
         $offset = (int)$this->request->get("offset");
         $limit = (int)$this->request->get("limit");
         $filter = $this->request->get("filter", '');
-        $search = $this->request->get("search", '');
-        $search = htmlspecialchars(strip_tags($search));
+        $search = $this->request->get("search", '', 'strip_tags,htmlspecialchars');
         $onlineaddons = $this->getAddonList();
         $filter = (array)json_decode($filter, true);
         $addons = get_addon_list();