本文实例讲述了php+mysql数据库实现无限分类的方法。分享给大家供大家参考。具体分析如下：

这款php无限分类代码比较完整理包括了数据库是mysql的,有增加、删除、编辑、移动的功能,同时还提供数据库sql表结构.代码如下:

//连接数据库

$link = mysql_connect('localhost','root','') or die(mysql_error());

mysql_select_db('class',$link)or die(mysql_error());

mysql_query("set names gbk");

//无限分类类库

class sortclass{

var $data = array();

var $child = array(-1=>array());

var $layer = array(-1=>-1);

var $parent = array();

var $link;

var $table;

function sortclass($link, $table){

$this->setnode(0, -1, '顶极节点');

$this->link = $link;

$this->table = $table;

$node = array();

$results = mysql_query("select * from $this->table",$this->link);

while($node = mysql_fetch_array($results)){

$this->setnode($node['id'],$node['f_id'],$node['name']);

}

}

function setnode ($id, $parent, $value){

$parent = $parent?$parent:0;

$this->data[$id] = $value;

$this->child[$id] = array();

$this->child[$parent][] = $id;

$this->parent[$id] = $parent;

$this->layer[$id] = !isset($this->layer[$parent])? 0 : $this->layer[$parent] + 1;

}

function getlist (&$tree, $root= 0){

foreach ($this->child[$root] as $key=>$id){

$tree[] = $id;

if ($this->child[$id]) $this->getlist($tree, $id);

}

}

function getvalue ($id){return $this->data[$id];}

function getlayer ($id, $space = false){

return $space?str_repeat($space, $this->layer[$id]):$this->layer[$id];

}

function getparent ($id){return $this->parent[$id];}

function getparents ($id){

while ($this->parent[$id] != -1){

$id = $parent[$this->layer[$id]] = $this->parent[$id];

}

ksort($parent);

reset($parent);

return $parent;

}

function getchild ($id){return $this->child[$id];}

function getchilds ($id = 0){

$child = array($id);

$this->getlist($child, $id);

return $child;

}

function addnode($name,$pid){

//echo "insert into $this->table (`f_id`,`name`) values ('$pid','$name')";exit;

mysql_query("insert into $this->table (`f_id`,`name`) values ('$pid','$name')",$this->link);

}

function modnode($cid, $newname){

mysql_query("update $this->table set `name`='$newname' where `id` = $cid",$this->link);

}

function delnode($cid){

$allchilds = $this->getchilds($cid);

$sql ='';

if(emptyempty($allchilds)){

$sql = "delete from $this->table where `id` = $cid";

}else{

$sql = 'delete from '.$this->table.' where `id` in ('.implode(',',$allchilds).','.$cid.')';

}

mysql_query($sql,$this->link);

}

function movenode($cid, $topid){

mysql_query("update $this->table set `f_id`=$topid where `id` = $cid", $this->link);

}

}

//函数

function back(){

echo '';

exit;

}

//生成select

function makeselect($array,$formname){

global $tree;

$select = '';

foreach ($array as $id){

$select.=''.$tree->getlayer($id, '|-').$tree->getvalue($id)."";

}

return $select.'';

}

$tree = new sortclass($link,'`p_newsclass`');

$op = !emptyempty($_post['op']) ? $_post['op'] : $_get['op'];

if(!emptyempty($op)){

if($op=='add'){

$tree->addnode($_post['cname'],$_post['pid']);

back();

}

if($op=='mod'){

$tree->modnode($_post['cid'],$_post['cname']);

back();

}

if($op=='del'){

$tree->delnode($_get['cid']);

back();

}

if($op=='move'){

$tree->movenode($_post['who'],$_post['to']);

back();

}

}

$category = $tree->getchilds();

?>

前台调用实例代码如下:

body{font-size:12px;}

ul{list-style:none;}

a{cursor:pointer;}

function $(e){return document.getelementbyid(e);}

function mod(cid){

$('cid').value=cid;

$('op').value='mod';

$('name').style.border='1px solid red';

}

名称: 添加到:=makeselect($category,'pid')?>

移动分类

=makeselect($category,'who')?> gt;移动到:=makeselect($category,'to')?>

foreach ($category as $id){

echo '

'.$tree->getlayer($id, '|－ ').$tree->getvalue($id).' del edit ';

}

?>

用phpmyadmin导入此数据库就ok了,实例代码如下:

-- phpmyadmin sql dump

-- version 3.2.4

--

-- 主机: localhost

-- 生成日期: 2010 年 07 月 02 日 03:02

-- 服务器版本: 5.1.41

-- php 版本: 5.3.1

set sql_mode="no_auto_value_on_zero";

/*!40101 set @old_character_set_client=@@character_set_client */;

/*!40101 set @old_character_set_results=@@character_set_results */;

/*!40101 set @old_collation_connection=@@collation_connection */;

/*!40101 set names utf8 */;

--

-- 数据库: `class`

--

-- --------------------------------------------------------

--

-- 表的结构 `p_newsclass`

--

create table if not exists `p_newsclass` (

`id` int(7) not null auto_increment,

`f_id` int(7) not null,

`name` varchar(255) not null,

primary key (`id`)

) engine=innodb  default charset=utf8 auto_increment=10 ;

--

-- 转存表中的数据 `p_newsclass`

--

insert into `p_newsclass` (`id`, `f_id`, `name`) values

(3, 0, '中国'),

(4, 3, '福建'),

(5, 4, '龙岩市'),

(7, 4, '厦门市'),

(9, 5, '漳平市');

/*!40101 set character_set_client=@old_character_set_client */;

/*!40101 set character_set_results=@old_character_set_results */;

/*!40101 set collation_connection=@old_collation_connection */;

希望本文所述对大家的PHP+mysql程序设计有所帮助。