public function getPostsByTag($tagId, $current, $count = 10)
{
$where = 'id IN (SELECT re.article_id FROM ar_article_tag re WHERE re.tag_id=:tag)';
$params = [':tag' => $tagId];
$total = $this->getPostCount($where, $params);
list($total, $offset, $count, $page_nums, $current) = Tools::createPageInfo($total, $count, $current);
$sql = "SELECT * FROM `ar_article` WHERE {$where} ORDER BY `publish_date` DESC LIMIT {$offset}, {$count}";
$stat = $this->getPDO()->prepare($sql);
$stat->execute($params);
return ['data' => $stat->fetchAll(\PDO::FETCH_ASSOC), 'page' => ['total' => $total, 'offset' => $offset, 'count' => $count, 'page_nums' => $page_nums, 'current' => $current]];
}
