php+mysql資料庫實現無限分類的方法，mysql資料庫_PHP教程

php+mysql資料庫實現無限分類的方法，mysql資料庫

本文執行個體講述了php+mysql資料庫實現無限分類的方法。分享給大家供大家參考。具體分析如下：

這款php無限分類代碼比較完整理包括了資料庫是mysql的,有增加、刪除、編輯、移動的功能,同時還提供資料庫sql表結構.代碼如下:
複製代碼 代碼如下://串連資料庫
$link = mysql_connect('localhost','root','') or die(mysql_error());
mysql_select_db('class',$link)or die(mysql_error());
mysql_query("set names gbk");
//無限分類類庫
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, '頂極節點');
$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", $this->link);
}
}
//函數
function back(){
echo '';
exit;
}
//產生select
function makeselect($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();
?>
前台調用執行個體代碼如下:
複製代碼 代碼如下:

移動分類

<?php
foreach ($category as $id){
echo '
• '.$tree->getlayer($id, '|－ ').$tree->getvalue($id).' del edit
';
}
?>

用phpmyadmin匯入此資料庫就ok了,執行個體代碼如下:
複製代碼 代碼如下:-- phpmyadmin sql dump
-- version 3.2.4
--
-- 主機: localhost
-- 產生日期: 2010 年 07 月 02 日 03:02
-- 伺服器版本: 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 */;
--
-- 資料庫: `class`
--
-- --------------------------------------------------------
--
-- 表的結構 `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 ;
--
-- 轉存表中的資料 `p_newsclass`
--
insert into `p_newsclass` (`id`, `f_id`, `name`) values
(3, 0, '中國'),
(4, 3, '福建'),
(5, 4, '龍岩市'),
(7, 4, '廈門市'),
(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 */;

希望本文所述對大家的PHP+mysql程式設計有所協助。

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