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简单实用的PHP无限分类源码分享
转载自：玉米串
关于PHP的无限分类代码，网上已经有很多了，讲解的也很到位，在这里我分享一下我用着很顺手的一个。
下面一段代码是创建相应数据库的sql代码：- 1 ////////////// 2 //////无限分类的数据库设计及样例 3 ////////////// 4 mysql> create database db_kind; 5 Query OK, 1 row affected 6 7 mysql> use db_kind; 8 Database changed 9 mysql> create table tb_kind( 10 -> id int not null auto_increment primary key, 11 -> pid int, 12 -> path varchar(200) 13 -> ); 14 Query OK, 0 rows affected 15 16 mysql> insert into tb_kind values(null,"新闻",0,0); 17 Query OK, 1 row affected 18 19 mysql> insert into tb_kind values(null,"视频",0,0); 20 Query OK, 1 row affected 21 22 mysql> insert into tb_kind values(null,"图片",0,0); 23 Query OK, 1 row affected 24 25 mysql> insert into tb_kind values(null,"博客",0,0); 26 Query OK, 1 row affected 27 28 mysql> insert into tb_kind values(null,"体育新闻",1,"0-1"); 29 Query OK, 1 row affected 30 31 mysql> insert into tb_kind values(null,"娱乐新闻",1,"0-1"); 32 Query OK, 1 row affected 33 34 mysql> insert into tb_kind values(null,"财经新闻",1,"0-1"); 35 Query OK, 1 row affected 36 37 mysql> select * from db_kind; 38 ERROR 1146 : Table 'db_kind.db_kind' doesnot exist 39 mysql> select * from tb 40 _kind; 41 +----+----------+-----+------+ 42 | id | pname | pid | path | 43 +----+----------+-----+------+ 44 | 1 | 新闻 | 0 | 0 | 45 | 2 | 视频 | 0 | 0 | 46 | 3 | 图片 | 0 | 0 | 47 | 4 | 博客 | 0 | 0 | 48 | 5 | 体育新闻 | 1 | 0-1 | 49 | 6 | 娱乐新闻 | 1 | 0-1 | 50 | 7 | 财经新闻 | 1 | 0-1 | 51 +----+----------+-----+------+ 52 7 rows in set 53 mysql> insert into tb_kind values(null,"篮球新闻",5,"0-1-5"); 54 Query OK, 1 row affected 55 56 mysql> insert into tb_kind values(null,"足球新闻",5,"0-1-5"); 57 Query OK, 1 row affected 58 59 mysql> select * from tb_kind; 60 +----+----------+-----+-------+ 61 | id | pname | pid | path | 62 +----+----------+-----+-------+ 63 | 1 | 新闻 | 0 | 0 | 64 | 2 | 视频 | 0 | 0 | 65 | 3 | 图片 | 0 | 0 | 66 | 4 | 博客 | 0 | 0 | 67 | 5 | 体育新闻 | 1 | 0-1 | 68 | 6 | 娱乐新闻 | 1 | 0-1 | 69 | 7 | 财经新闻 | 1 | 0-1 | 70 | 8 | 篮球新闻 | 5 | 0-1-5 | 71 | 9 | 足球新闻 | 5 | 0-1-5 | 72 +----+----------+-----+-------+ 73 9 rows in set 74 75 mysql> insert into tb_kind values(null,"NBA",8,"0-1-5-8"); 76 Query OK, 1 row affected 77 78 mysql> insert into tb_kind values(null,"CBA",8,"0-1-5-8"); 79 Query OK, 1 row affected 80 81 mysql> select * from tb_kind; 82 +----+----------+-----+---------+ 83 | id | pname | pid | path | 84 +----+----------+-----+---------+ 85 | 1 | 新闻 | 0 | 0 | 86 | 2 | 视频 | 0 | 0 | 87 | 3 | 图片 | 0 | 0 | 88 | 4 | 博客 | 0 | 0 | 89 | 5 | 体育新闻 | 1 | 0-1 | 90 | 6 | 娱乐新闻 | 1 | 0-1 | 91 | 7 | 财经新闻 | 1 | 0-1 | 92 | 8 | 篮球新闻 | 5 | 0-1-5 | 93 | 9 | 足球新闻 | 5 | 0-1-5 | 94 | 10 | NBA | 8 | 0-1-5-8 | 95 | 11 | CBA | 8 | 0-1-5-8 | 96 +----+----------+-----+---------+ 97 11 rows in set 98 99 mysql> select concat(path,"-",id) from tb_kind;100 +---------------------+101 | concat(path,"-",id) |102 +---------------------+103 | 0-1 |104 | 0-2 |105 | 0-3 |106 | 0-4 |107 | 0-1-5 |108 | 0-1-6 |109 | 0-1-7 |110 | 0-1-5-8 |111 | 0-1-5-9 |112 | 0-1-5-8-10 |113 | 0-1-5-8-11 |114 +---------------------+115 11 rows in set116 117 mysql> select concat(path,"-",id) from tb_kind;118 +---------------------+119 | concat(path,"-",id) |120 +---------------------+121 | 0-1 |122 | 0-2 |123 | 0-3 |124 | 0-4 |125 | 0-1-5 |126 | 0-1-6 |127 | 0-1-7 |128 | 0-1-5-8 |129 | 0-1-5-9 |130 | 0-1-5-8-10 |131 | 0-1-5-8-11 |132 +---------------------+133 11 rows in set134 135 mysql> select concat(path,"-",id) as abs from tb_kind order by abs.path;136 ERROR 1054 : Unknown column 'abs.path' in 'order clause'137 mysql> select concat(path,"-",id) as abs from tb_kind order by abs138 ;139 +------------+140 | abs |141 +------------+142 | 0-1 |143 | 0-1-5 |144 | 0-1-5-8 |145 | 0-1-5-8-10 |146 | 0-1-5-8-11 |147 | 0-1-5-9 |148 | 0-1-6 |149 | 0-1-7 |150 | 0-2 |151 | 0-3 |152 | 0-4 |153 +------------+154 11 rows in set155 mysql> select concat(path,"-",id) as,id,name,path abs from tb_kind order by abs;156 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,name,path abs from tb_kind order by abs' at line 1157 mysql> select concat(path,"-",id) as abs,158 id,pname,path abs from tb_kind order by abs;159 +------------+----+----------+---------+160 | abs | id | pname | abs |161 +------------+----+----------+---------+162 | 0-1 | 1 | 新闻 | 0 |163 | 0-1-5 | 5 | 体育新闻 | 0-1 |164 | 0-1-5-8 | 8 | 篮球新闻 | 0-1-5 |165 | 0-1-5-8-10 | 10 | NBA | 0-1-5-8 |166 | 0-1-5-8-11 | 11 | CBA | 0-1-5-8 |167 | 0-1-5-9 | 9 | 足球新闻 | 0-1-5 |168 | 0-1-6 | 6 | 娱乐新闻 | 0-1 |169 | 0-1-7 | 7 | 财经新闻 | 0-1 |170 | 0-2 | 2 | 视频 | 0 |171 | 0-3 | 3 | 图片 | 0 |172 | 0-4 | 4 | 博客 | 0 |173 +------------+----+----------+---------+174 11 rows in set175 mysql>下面是php源文件：
- 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <title>无标题文档</title> 6 </head> 7 8 <body> 9 <!--显示结果10 新闻11 体育新闻12 篮球新闻13 NBA14 CBA15 足球新闻16 娱乐新闻17 财经新闻18 视频19 图片20 博客21 -->22 <?23 $conn=mysql_connect("localhost","root","root");24 mysql_select_db("db_kind");25 mysql_query("set names utf8");26 $sql="select concat(path,'-',id) as abspath,id,pname,path from tb_kind order by abspath";27 $rs=mysql_query($sql);28 while($result=mysql_fetch_assoc($rs)){29 $num=count(explode("-",$result[path]))-1;30 $new_str=str_repeat("---",$num);31 echo $new_str.$result[pname];32 echo "<br>";33 }34 $str=str_repeat("=",10);35 echo $str;36 $num=count(explode("-","0-1-5-8"))-1;37 echo $num;38 39 40 ?>41 </body>42 </html>
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发表于 2011-10-23 11:18