PHP全路径无限分类导航LINK代码实现

<?php/** * @param php全路径无限分类 */include(‘db.inc.php‘);function getPathCate($cateid){ ???$sql = "select * ,concat(path,‘,‘,id) fullpath from likecate where id = $cateid"; ???$res = mysql_query($sql); ???$row = mysql_fetch_assoc($res); ???$ids = $row[‘fullpath‘]; ???$sql = "select * from likecate where id in ($ids) orders by id asc"; ???$res = mysql_query($sql); ???$result = array(); ???while ($row = mysql_fetch_assoc($res)) { ???????$result[] = $row; ???} ???return $result;}function displayPath($cateid,$link=‘cate.php?cid=‘){ ???$res = getPathCate($cateid); ???$str = ‘‘; ???foreach ($res as $key => $value) { ???????$str .= "<a href =‘{$link}{$value[‘id‘]}‘>{$value[‘catename‘]}</a>"; ???}}echo displayPath(4,‘cate.php?p=1&cid=‘);