php+mysql数据库实现无限分类的方法

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 '<script language="网页特效">window.location.href="news.class.php?"+new date().gettime();</script>'; 

exit; 

} 

//生成select 

function makeselect($array,$formname){ 

global $tree; 

$select = '<select name="'.$formname.'">'; 

foreach ($array as $id){ 

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

} 

return $select.'</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:

<style type="text/css"> 

body{font-size:12px;} 

ul{list-style:none;} 

a{cursor:pointer;} 

</style> 

<script language="javascript"> 

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

function mod(cid){ 

$('cid').value=cid; 

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

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

} 

</script> 

<form action="" method="post"> 

名称:<input type="text" id="name" name="cname" /> 添加到:<?=makeselect($category,'pid')?><br /> 

<input type="hidden" id="op" name="op" value="add" /> 

<input type="hidden" id="cid" name="cid" /> 

<input type="submit" value="submit" /> 

</form> 

<h3>移动分类</h3> 

<form action="" method="post"> 

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

<input type="hidden" id="op" name="op" value="move" /> 

<input type="submit" value="submit" /> 

</form> 

<ul> 

<?php 

foreach ($category as $id){ 

echo '<li>'.$tree->getlayer($id, '|－ ').$tree->getvalue($id).' <a href="time.php?op=del&cid='.$id.'">del</a> <a onclick="mod('.$id.')">edit</a> </li>'; 

} 

?> 

</ul>

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。