query("SELECT * FROM article where cid='$cid' and id<'$id' order by id desc limit 1");
$link = $db -> fetchone($query);
if($link) {
echo('上一条：
'.$link['title'].'');
}else {
echo('上一条：无
');
}
?>
query("SELECT * FROM article where cid='$cid' and id>'$id' order by id asc limit 1");
$link1 = $db -> fetchone($query);
if($link1) {
echo('下一条：
'.$link1['title'].'');
}else {
echo('下一条：无
');
}
?>