public function actionSearch($q)
{
$pages = new Pagination(['totalCount' => Topic::find()->where(['like', 'title', $q])->count('id'), 'pageSize' => intval($this->settings['index_pagesize']), 'pageParam' => 'p']);
return $this->render('index', ['topics' => Topic::getTopicsFromSearch($pages, $q), 'pages' => $pages, 'title' => '搜索结果：' . $q]);
}
