php+mysql实现的无限分类方法类定义与使用示例

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php+mysql实现的无限分类方法类定义与使用示例

本文实例讲述了php+mysql实现的无限分类方法类定义与使用，分享给大家供大家参考，具体如下：

创建数据库以及表

CREATE DATABASE `sortclass`DEFAULT CHARSET utf8;

CREATE TABLE IF NOT EXISTS `class` (

`cid` mediumint(8) unsigned NOT NULL auto_increment,

`pid` mediumint(8) unsigned NOT NULL,

`cname` varchar(50) NOT NULL,

PRIMARY KEY (`cid`),

KEY `pid` (`pid`)

) ENGINE=MyISAM DEFAULT CHARSET=utf8;

PHP代码：

header("Content-type: text/html; charset=utf-8");

//连接数据库

$link = mysql_connect('localhost','root','eric') or die(mysql_error());

mysql_select_db('sortclass',$link);

//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($node = mysql_fetch_assoc($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;

}

function addNode($name,$pid){

  mysql_query("insert into $this->table (`pid`,`cname`) values ('$pid','$name')",$this->link);

}

function modNode($cid, $newName){

  mysql_query("update $this->table set `cname`='$newName' where `cid` = $cid",$this->link);

}

function delNode($cid){

  $allChilds = $this->getChilds($cid);

  $sql ='';

  if(emptyempty($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);

}

function moveNode($cid, $topid){

  mysql_query("update $this->table set `pid`=$topid where `cid` = $cid", $this->link);

}

}

//函数

function back(){

echo '<script language="JavaScript">window.location.href="test.php?" rel="external nofollow" +new Date().getTime();</script>';

exit;

}

//声成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,'`class`');

$op = !emptyempty($_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();

?>

<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="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

foreach ($category as $id){

echo '<li>'.$tree->getLayer($id, '|－ ').$tree->getValue($id).' <a href="test.php?op=del&cid='.$id.'" rel="external nofollow" >Del</a> <a onclick="mod('.$id.')">Edit</a> </li>';

}

?>

</ul>

出处：http://www.phpfensi.com/php/20220310/20117.html

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