PHP实例：PHP无限极分类_[PHP教程]
php无限极分类
CODE=PHP]
至于添加删除之类的功能我就不多写了!仔细看看就知道这么用了.
难的是显示方面
希望高手扩展一下!
QUOTE:
这是类
/*========================================================
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".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".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 = "
";
}else{
cata_img = "
";
}
path = explode(":",row['catalog_path_number']);
if(count(path) > 1){
for(i=1;i path_img .= "";
}
}
echo path_img.cata_img;
echo "";
path_img = "";
if(this->sun_catalog(row['catalog_id'])){
hidden_div = "style='display:none'";
echo "";
this->catalog_show(row['catalog_id']);
echo "";
}
}
}
}
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".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".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".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".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".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".mysql_error());
}
}
?>
[/CODE]
来源：CSDN