private function get_limit(array $args)
{
if (!empty($args['number']) && 0 < $args['number']) {
$number = (int) $args['number'];
$start = empty($args['page']) && 2 > $args['page'] ? 0 : ($args['page'] - 1) * $number;
$end = $start + $number;
return "LIMIT {$start}, {$end}";
}
return '';
}