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PHP无限级分类示例

PHP代码 2011-01-18 21:24:56 作者: 浩海代码网阅读() 评论字号：大中小订阅

PHP无限级分类示例，一个简单的PHP无限级分类示例，本代码是在改进网上的一实例，转移和添加功能已经本人测试通过，放心使用，直接运行当前文件便可PHP.
本分类方法的优势：

1，数据库结构简单，只有 cid pid name 三个字段，无任何冗余字段
2，不使用递归查询，所有操作只需一条sql语句
3，所有数据在读取一次数据库后，在数组内进行分析处理，节省数据库服务器资源

<?php    
header("Content-type: text/html; charset=utf-8");    
   
/**   
 +----------------------------------------------------------   
 * franklin 例子   
 +----------------------------------------------------------   
 * 文件名称  scort.php   
 +----------------------------------------------------------   
 * 文件描述  无限级分类示例   
 +----------------------------------------------------------   
 * 作    者  franklin<franklin@co-insight.com>   
 +----------------------------------------------------------   
 * 时    间  2011-1-18   
 +----------------------------------------------------------   
 */   
 //先创建一个数据库    
/*CREATE TABLE IF NOT EXISTS `scortclass` (   
`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; */   
   
//连接数据库    
$link = mysql_connect('localhost','root','123') or die(mysql_error());    
mysql_select_db('test',$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();    
mysql_query("set names 'utf8'");    
$results = mysql_query('select * from '.$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 $child;    
}    
function addNode($pid,$name){    
    //die("insert into $this->table (`pid`,`cname`) values ('$pid','$name')");    
    //$sql = "insert into `class` (`pid`,`cname`) values ('0','爱情')";    
    mysql_query('set names utf8');    
mysql_query("insert into $this->table (`pid`,`cname`) values ('$pid','$name')");    
}    
function modNode($cid, $newName){    
mysql_query("update $this->table set `cname`='$newName' where `cid` = $cid",$this->link) or die(mysql_error());    
}    
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", $this->link);    
}    
}    
//函数    
function back(){    
echo '<script language="javascript">[removed].href="cache_index.php?"+new Date().getTime();</script>';    
exit;    
}    
//声成select    
function makeSelect($array,$formName){    
global $tree;    
$select = '<select name="'.$formName.'">';    
foreach ($array as $id){    
    echo $id;    
$select.='<option value="'.$id.'">'.$tree->getLayer($id, '|-').$tree->getValue($id)."</option>";    
}    
return $select.'</select>';    
}    
$tree = new SortClass($link,'`sortclass`');    
$op = !emptyempty($_POST['op']) ? $_POST['op'] : $_GET['op'];    
if(!emptyempty($op)){    
   
if($op=='add'){    
$tree->addNode($_POST['pid'],$_POST['cname']);    
//back();    
}    
   
if($op=='mod'){    
$tree->modNode($_POST['cid'],$_POST['cname']);    
//back();    
}    
   
if($op=='del'){    
$tree->delNode($_GET['cid']);    
//back();    
}    
   
if($op=='move'){    
    print_r($_POST['who']);    
$tree->moveNode($_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';    
$('name').style.border='1px solid red';    
}    
</script>    
<form action="cache_index.php" method="POST">    
名称:<input type="text" id="name" name="cname" /> 添加到:<?=makeSelect($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="cache_index.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($id).' <a href="cache_index.php?op=del&cid='.$id.'">Del</a> <a onclick="mod('.$id.')">Edit</a> </li>';    
}    
?>    
</ul>

效果图如下：