一个无限分类的PHP类: <?php /** * @author YangHuan,Fonqing * @datetime * @version 1.0.0 * This class base at Yanghuan's PHP Tree * Modify By Fonqing: * Memo: * 1,Add some method functions */ class SortClass{ public $data = array(); public $child = array(-1=>array()); public $layer = array(-1=>-1); public $parent = array(); public $link; public $table; /** * void SortClass($link, $table) * The constructor of the class * @param $link resource MySQL link identifier * @param $table string The name of the category talbe * @return void */ function SortClass($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_assoc($results)){ $this->setNode($node['cid'],$node['pid'],$node['cname']); } } 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 $child; } /** * void addNode($name, $pid) * Add a new Node to the tree and insert into the database * @param $name string The node name * @param $pid integer The parent node of this new node * @return void */ function addNode($name, $pid){ mysql_query("insert into $this->table (`pid`,`cname`) values ('$pid','$name')", $this->link); } /** * void modNode($cid, $newName) * Modify a node to a new name * @param $cid integer The `cid` of the node which to modify * @param $newName string The new name * @return void */ function modNode($cid, $newName){ mysql_query("update $this->table set `cname`='$newName' where `cid` = $cid", $this->link); } /** * void delNode($cid) * Delete a node and all of its childs * @param $cid integer The node to delete * @return void */ function delNode($cid){ $allChilds = $this->getChilds($cid); $sql =''; if(empty($allChilds)){ $sql = "delete from $this->table where `cid` = $cid"; }else{ $sql = 'delete from '.$this->table.' where `cid` in ('.implode(',',$allChilds).','.$cid.')'; } mysql_query($sql, $this->link); } /** * void moveNode($cid, $topid) * Add a new Node to the tree and insert into the database * @param $cid integer The node id which to move * @param $topid integer New parent id * @return void */ function moveNode($cid, $topid){ $tos = $this->getChilds($cid); if(in_array($topid,$tos)) return;//不能移动到其子分类 mysql_query("update $this->table set `pid`=$topid where `cid` = $cid", $this->link); }
function __destruct(){ unset($this->data, $this->child, $this->parent, $this->layer); } } ?>
上面的类就只用了cid, pid, cname三个字段做的一个,转一篇别人应用这个类的例子 <?php header("Content-type: text/html; charset=utf-8"); //Import the class require('Class.sort.php'); //Connect to the MySQL server $link = mysql_connect('host','user','pass') or die(mysql_error()); mysql_select_db('sortclass',$link); $tree = new SortClass($link,'`class`'); //Some functions function back(){ echo '<script language="javascript">window.location.href="test.php?"+new Date().getTime();</script>'; exit; } //Create select html 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>'; } //Controller $op = !empty($_POST['op']) ? $_POST['op'] : $_GET['op']; if(!empty($op)){
不会吧我其实是还有个最顶级的分类。 但我省去, 直接从第二级分类开始。 id f_id f_name 这个顶级分类其实不是顶级,他分为20个分类子分类 id c_id 子分类字段序号 c_name 子分类字段名字 这个子分类是上面顶级分类的子类,每个顶级分类下有几十个小分类。 说着看着,越来越乱。我的方法是从一本书中搬过来的。书中只设定好数据库,SQL中用INNER JOIN,不多的代码就解决了这个分类问题。 书名《PHP+mysql八大WEB动态实战》,看过这说的请解释解释。红心兄弟第一个代码大军也太庞大了吧。 我先试试红心兄弟第二个例子。
<?php header("Content-type: text/html; charset=utf-8"); //Import the class require('Class.sort.php'); //Connect to the MySQL server $link = mysql_connect('host','user','pass') or die(mysql_error()); mysql_select_db('sortclass',$link); $tree = new SortClass($link,'`class`'); //Some functions 第二行就看不懂。 require('Class.sort.php');这个'Class.sort.php是哪里跑来的文件?
<?php
/**
* @author YangHuan,Fonqing
* @datetime
* @version 1.0.0
* This class base at Yanghuan's PHP Tree
* Modify By Fonqing:
* Memo:
* 1,Add some method functions
*/
class SortClass{
public $data = array();
public $child = array(-1=>array());
public $layer = array(-1=>-1);
public $parent = array();
public $link;
public $table;
/**
* void SortClass($link, $table)
* The constructor of the class
* @param $link resource MySQL link identifier
* @param $table string The name of the category talbe
* @return void
*/
function SortClass($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_assoc($results)){
$this->setNode($node['cid'],$node['pid'],$node['cname']);
}
}
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 $child;
}
/**
* void addNode($name, $pid)
* Add a new Node to the tree and insert into the database
* @param $name string The node name
* @param $pid integer The parent node of this new node
* @return void
*/
function addNode($name, $pid){
mysql_query("insert into $this->table (`pid`,`cname`) values ('$pid','$name')", $this->link);
}
/**
* void modNode($cid, $newName)
* Modify a node to a new name
* @param $cid integer The `cid` of the node which to modify
* @param $newName string The new name
* @return void
*/
function modNode($cid, $newName){
mysql_query("update $this->table set `cname`='$newName' where `cid` = $cid", $this->link);
}
/**
* void delNode($cid)
* Delete a node and all of its childs
* @param $cid integer The node to delete
* @return void
*/
function delNode($cid){
$allChilds = $this->getChilds($cid);
$sql ='';
if(empty($allChilds)){
$sql = "delete from $this->table where `cid` = $cid";
}else{
$sql = 'delete from '.$this->table.' where `cid` in ('.implode(',',$allChilds).','.$cid.')';
}
mysql_query($sql, $this->link);
}
/**
* void moveNode($cid, $topid)
* Add a new Node to the tree and insert into the database
* @param $cid integer The node id which to move
* @param $topid integer New parent id
* @return void
*/
function moveNode($cid, $topid){
$tos = $this->getChilds($cid);
if(in_array($topid,$tos)) return;//不能移动到其子分类
mysql_query("update $this->table set `pid`=$topid where `cid` = $cid", $this->link);
}
function __destruct(){
unset($this->data,
$this->child,
$this->parent,
$this->layer);
}
}
?>
<?php
header("Content-type: text/html; charset=utf-8");
//Import the class
require('Class.sort.php');
//Connect to the MySQL server
$link = mysql_connect('host','user','pass') or die(mysql_error());
mysql_select_db('sortclass',$link);
$tree = new SortClass($link,'`class`');
//Some functions
function back(){
echo '<script language="javascript">window.location.href="test.php?"+new Date().getTime();</script>';
exit;
}
//Create select html
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>';
}
//Controller
$op = !empty($_POST['op']) ? $_POST['op'] : $_GET['op'];
if(!empty($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();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<title>无限分类示例</title>
<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='2px solid red';
$('name').value = '这里填写新名称';
}
</script>
</head>
<body>
<h3>编辑分类</h3>
<form action="test.php" method="post">
名称:<input type="text" id="name" name="cname" /> 添加到:<?=makeSelect($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="test.php" method="post">
<?=makeSelect($category,'who')?>移动到:<?=makeSelect($category,'to')?>
<input type="hidden" id="op" name="op" value="move" />
<input type="submit" value="Submit" />
</form>
<ul>
<?php
//Display the tree
foreach ($category as $id){
echo '<li>'.$tree->getLayer($id, '|- ').$tree->getValue($id).' <a href="test.php?op=del&cid='.$id.'">Del</a> <a onclick="mod('.$id.')">Edit</a> </li>';
}
?>
</ul>
</body>
</html>
你的c_id字段用来记录 顶级分类 的 id字段 就好了呀。----------------------------------------------------------------------------------用一张表也可以做无限级分类呀。顶级分类:
id 分类ID
f_id 记录上级分类ID,最高级为0
f_name 分类名称
但我省去, 直接从第二级分类开始。
id
f_id
f_name 这个顶级分类其实不是顶级,他分为20个分类子分类
id
c_id 子分类字段序号
c_name 子分类字段名字
这个子分类是上面顶级分类的子类,每个顶级分类下有几十个小分类。
说着看着,越来越乱。我的方法是从一本书中搬过来的。书中只设定好数据库,SQL中用INNER JOIN,不多的代码就解决了这个分类问题。
书名《PHP+mysql八大WEB动态实战》,看过这说的请解释解释。红心兄弟第一个代码大军也太庞大了吧。
我先试试红心兄弟第二个例子。
header("Content-type: text/html; charset=utf-8");
//Import the class
require('Class.sort.php');
//Connect to the MySQL server
$link = mysql_connect('host','user','pass') or die(mysql_error());
mysql_select_db('sortclass',$link);
$tree = new SortClass($link,'`class`');
//Some functions
第二行就看不懂。
require('Class.sort.php');这个'Class.sort.php是哪里跑来的文件?