Typecho 获取站点最后更新时间

Handsome主题有的侧边栏显示最后更新那个功能，换成了自己主题以后只能自己实现了，不过也不难

/**
 * 获取站点最后更新时间
 *
 * @return null
 * @date 2020-05-01
 */
public function lastUpdate()
{
    $db = Typecho_Db::get();
    $create = $db->fetchRow($db->select('created')->from('table.contents')->limit(1)->order('created', Typecho_Db::SORT_DESC));
    $update = $db->fetchRow($db->select('modified')->from('table.contents')->limit(1)->order('modified', Typecho_Db::SORT_DESC));
    if ($create >= $update) {
        echo Typecho_I18n::dateWord($create['created'], time());
        echo Typecho_I18n::dateWord($update['modified'], time());
    }
}