This code work for me
$search = $_POST['searching'];
$_query = sprintf("SELECT SQL_CALC_FOUND_ROWS * FROM pp_files WHERE `name` like '%%$search%%' OR`description` like '%%$search%%' AND `approved` = '1' ORDER BY $sort $order1 LIMIT %d,%d",
SmartyPaginate::getCurrentIndex(), SmartyPaginate::getLimit());