比较简单实用的PHP无限分类源码分享(思路不错)
分类：PHP作者：编程之家
下面一段代码是创建相应数据库的sql代码：
<div class="codetitle"><a style="CURSOR: pointer" data="13442" class="copybut" id="copybut13442" onclick="doCopy('code13442')"> 代码如下:
<div class="codebody" id="code13442">
//////////////
//////无限
分类的
数据库设计及样例
//////////////
MysqL> create database db_kind;
Query OK,1 row affected
MysqL> use db_kind;
Database changed
MysqL> create table tb_kind(
-> id int not null auto_increment primary key,
-> pid int,
-> path varchar(200)
-> );
Query OK,0 rows affected
MysqL> insert into tb_kind values(null,"新闻",0);
Query OK,1 row affected
MysqL> insert into tb_kind values(null,"视频","
图片","
博客","体育新闻",1,"0-1");
Query OK,"娱乐新闻","财经新闻",1 row affected
MysqL> select
from db_kind;
ERROR 1146 : Table 'db_kind.db_kind' doesnot exist
MysqL> select from tb
_kind;
+----+----------+-----+------+
| id | pname | pid | path |
+----+----------+-----+------+
| 1 | 新闻 | 0 | 0 |
| 2 | 视频 | 0 | 0 |
| 3 |
图片 | 0 | 0 |
| 4 |
博客 | 0 | 0 |
| 5 | 体育新闻 | 1 | 0-1 |
| 6 | 娱乐新闻 | 1 | 0-1 |
| 7 | 财经新闻 | 1 | 0-1 |
+----+----------+-----+------+
7 rows in set
MysqL> insert into tb_kind values(null,"篮球新闻",5,"0-1-5");
Query OK,"足球新闻",1 row affected
MysqL> select
from tb_kind;
+----+----------+-----+-------+
| id | pname | pid | path |
+----+----------+-----+-------+
| 1 | 新闻 | 0 | 0 |
| 2 | 视频 | 0 | 0 |
| 3 | 图片 | 0 | 0 |
| 4 | 博客 | 0 | 0 |
| 5 | 体育新闻 | 1 | 0-1 |
| 6 | 娱乐新闻 | 1 | 0-1 |
| 7 | 财经新闻 | 1 | 0-1 |
| 8 | 篮球新闻 | 5 | 0-1-5 |
| 9 | 足球新闻 | 5 | 0-1-5 |
+----+----------+-----+-------+
9 rows in setMysqL> insert into tb_kind values(null,"NBA",8,"0-1-5-8");
Query OK,"CBA",1 row affectedMysqL> select from tb_kind;
+----+----------+-----+---------+
| id | pname | pid | path |
+----+----------+-----+---------+
| 1 | 新闻 | 0 | 0 |
| 2 | 视频 | 0 | 0 |
| 3 |
图片 | 0 | 0 |
| 4 |
博客 | 0 | 0 |
| 5 | 体育新闻 | 1 | 0-1 |
| 6 | 娱乐新闻 | 1 | 0-1 |
| 7 | 财经新闻 | 1 | 0-1 |
| 8 | 篮球新闻 | 5 | 0-1-5 |
| 9 | 足球新闻 | 5 | 0-1-5 |
| 10 | NBA | 8 | 0-1-5-8 |
| 11 | CBA | 8 | 0-1-5-8 |
+----+----------+-----+---------+
11 rows in set
MysqL> select concat(path,"-",id) from tb_kind;
+---------------------+
| concat(path,id) |
+---------------------+
| 0-1 |
| 0-2 |
| 0-3 |
| 0-4 |
| 0-1-5 |
| 0-1-6 |
| 0-1-7 |
| 0-1-5-8 |
| 0-1-5-9 |
| 0-1-5-8-10 |
| 0-1-5-8-11 |
+---------------------+
11 rows in set
MysqL> select concat(path,id) as abs from tb_kind order by abs.path;
ERROR 1054 : Unk
Nown column 'abs.path' in 'order clause'
MysqL> select concat(path,id) as abs from tb_kind order by abs+------------+
| abs |
+------------+
| 0-1 |
| 0-1-5 |
| 0-1-5-8 |
| 0-1-5-8-10 |
| 0-1-5-8-11 |
| 0-1-5-9 |
| 0-1-6 |
| 0-1-7 |
| 0-2 |
| 0-3 |
| 0-4 |
+------------+
11 rows in set
MysqL> select concat(path,id) as,id,name,path abs from tb_kind order by abs;
ERROR 1064 : You have an error in your
sql Syntax; check the manual that corresponds to your
MysqL server version for the right
Syntax to use near 'id,path abs from tb_kind order by abs' at line 1
MysqL> select concat(path,id) as abs,
id,pname,path abs from tb_kind order by abs;
+------------+----+----------+---------+
| abs | id | pname | abs |
+------------+----+----------+---------+
| 0-1 | 1 | 新闻 | 0 |
| 0-1-5 | 5 | 体育新闻 | 0-1 |
| 0-1-5-8 | 8 | 篮球新闻 | 0-1-5 |
| 0-1-5-8-10 | 10 | NBA | 0-1-5-8 |
| 0-1-5-8-11 | 11 | CBA | 0-1-5-8 |
| 0-1-5-9 | 9 | 足球新闻 | 0-1-5 |
| 0-1-6 | 6 | 娱乐新闻 | 0-1 |
| 0-1-7 | 7 | 财经新闻 | 0-1 |
| 0-2 | 2 | 视频 | 0 |
| 0-3 | 3 |
图片 | 0 |
| 0-4 | 4 |
博客 | 0 |
+------------+----+----------+---------+
11 rows in set
MysqL>
