Home\Controller\PageController::diff PHP Method

    public function diff()
    {
        $login_user = $this->checkLogin();
        $page_history_id = I("page_history_id/d");
        $page_id = I("page_id/d");
        $page = D("Page")->where(" page_id = '{$page_id}' ")->find();
        $cur_page_content = $page['page_content'];
        $item_id = $page['item_id'] ? $page['item_id'] : $item_id;
        if (!$this->checkItemPermn($login_user['uid'], $item_id)) {
            $this->message(L('no_permissions'));
            return;
        }
        $page = D("PageHistory")->where(" page_history_id = '{$page_history_id}' ")->find();
        $page_content = gzuncompress(base64_decode($page['page_content']));
        $history_page_content = $page_content ? $page_content : $page['page_content'];
        $this->assign("cur_page_content", $cur_page_content);
        $this->assign("history_page_content", $history_page_content);
        $this->display();
    }