php 无限极分类

<?php 
/*======================================================== 
类名:catalog 
功能:无限分级类 
方法: 
树形显示分类 
catalog_show($id) //参数$id 递归调用 
流程:找到父分类为0所有根分类-> 一直递归取得所有分类并显示   
添加分类 
catalog_add($uid,$name) //$uid 父id //$name 分类名   
流程:依据$uid,在此id下添加一个新子id 
删除分类 
catalog_del($uid)//参数 $uid 数要删除的分类 
修改分类 
catalog_set($id,$name) //参数 $id 要修改的分类 //参数 $name 新的分类名 
变量: 
$config //数据库信息-> host,user,pass,dbname 
$catalog_dbname //分类数据库名 
数据库: 
catalog_id //分类的自然序号 
catalog_uid //分类的父分类 
catalog_name //分类名 
catalog_path_number //亲缘树数字形式 0:1:2 
catalog_path_char //亲缘树字符形式 分类1:分类1.1:分类1.1.1 
参照文章 http://www.phpchina.com/12823/viewspace_4468.html 
========================================================*/ 
class catalog{ 
var $config; 
var $catalog_dbname; 
var $links; 
private function connect(){ 
$this->links = mysql_connect($this->config['host'],$this->config['user'],$this->config['pass']) or die("错误: 第".__LINE__."行<br>".mysql_error()); 
mysql_select_db($this->config['dbname'],$this->links); 
mysql_query("SET NAMES gb2312"); 
} 
function catalog_show($uid = 0){ 
$this->connect(); 
$sql = "Select * FROM ".$this->catalog_dbname. " 
Where catalog_uid = ". $uid ." 
orDER BY catalog_id "; 
$result = mysql_query($sql,$this->links) or die("错误: 第".__LINE__."行<br>".mysql_error()); 
if(mysql_num_rows($result) > 0){ 
while ($row = mysql_fetch_assoc($result)){   
if($this->sun_catalog($row['catalog_id'])){//判断有没有子分类 
$cata_img = "<img id = 'img".$row['catalog_id']."' src='./img/last_node.jpg' ōnclick='click_catalog(".$row['catalog_id'].")'/>"; 
}else{ 
$cata_img = "<img src='./img/sp.jpg'/>"; 
} 
$path = explode(":",$row['catalog_path_number']); 
if(count($path) > 1){ 
for($i=1;$i<count($path);$i++){ 
$path_img .= "<img src='./img/sp.jpg'/>"; 
} 
} 
echo $path_img.$cata_img; 
echo "<a class='menu' href = 'javascrīpt:send_id(".$row['catalog_id'].")'>"; 
echo $row['catalog_name']."</a><br>"; 
$path_img = ""; 
if($this->sun_catalog($row['catalog_id'])){   
$hidden_div = "style='display:none'";   
echo "<div id = 'div".$row['catalog_id']."' ".$hidden_div.">";   
$this->catalog_show($row['catalog_id']); 
echo "</div>"; 
}   
} 
}   
} 
private function sun_catalog($uid){//判断是否有子分类 
$sql = "Select * FROM ".$this->catalog_dbname. " 
Where catalog_uid = ". $uid ." 
orDER BY catalog_id "; 
$result = mysql_query($sql,$this->links) or die("错误: 第".__LINE__."行<br>".mysql_error()); 
if(mysql_num_rows($result) > 0){ 
return true; 
}else{ 
return false; 
} 
} 
function catalog_add($uid,$name){ 
//获取父id的亲缘树 
$this->connect(); 
$sql = "Select * FROM ".$this->catalog_dbname." 
Where catalog_id = '".$uid."'"; 
$result = mysql_query($sql,$this->links) 
or die("错误: 第".__LINE__."行<br>".mysql_error()); 
$row = mysql_fetch_assoc($result); 
$fid_path_number = $row['catalog_path_number'];//id的数字亲缘树 
$fid_path_char = $row['catalog_path_char'];//id的字符亲缘树 
//插入数据 先插入行->再找到最新插入的id, 在依据这个id进行修改 
$sql = "Insert INTO ".$this->catalog_dbname."(catalog_uid,catalog_name) 
VALUES(".$uid.",'".$name."')"; 
$result = mysql_query($sql,$this->links) 
or die("错误: 第".__LINE__."行<br>".mysql_error()); 
$catalog_id = mysql_insert_id();//获取自己的id 
$catalog_path_number = $fid_path_number.":".$catalog_id;//得到自己的数字亲缘数 
$catalog_path_char = $fid_path_char.":".$name;//得到自己的字符亲缘数 
$sql = "Update '".$this->catalog_dbname."' 
SET 
catalog_path_number = '".$catalog_path_number."', 
catalog_path_char = '".$catalog_path_char."' 
Where 
catalog_id = ".$catalog_id;   
mysql_query($sql,$this->links) 
or die("错误: 第".__LINE__."行<br>".mysql_error());   
} 
function catalog_del($id){ 
$this->connect(); 
$sql = "Delete FROM ".$this->catalog_dbname." 
Where catalog_id = ".$id; 
mysql_query($sql,$this->links) 
or die("错误: 第".__LINE__."行<br>".mysql_error()); 
} 
function catalog_set($id,$name){ 
$this->connect(); 
$sql = "Update ".$this->catalog_dbname." 
SET 
catalog_name = '".$name."' 
Where 
catalog_id = ".$id;   
mysql_query($sql,$this->links) 
or die("错误: 第".__LINE__."行<br>".mysql_error()); 
} 
} 
?>