function humandate($timestamp) {

        $seconds = time() - $timestamp;

        if($seconds > 31536000) {

                return date('Y-n-j',$timestamp);

        } elseif($seconds > 2592000) {

                return ceil($seconds / 2592000).'月前';

        } elseif($seconds > 86400) {

                return ceil($seconds / 86400).'天前';

        } elseif($seconds > 3600) {

                return ceil($seconds / 3600).'小时前';

        } elseif($seconds > 60) {

                return ceil($seconds / 60).'分钟前';

        } else {

                return $seconds.'秒前';

        }

}