//连接数据库教程

$link = mysql教程_connect('localhost','root','密码') or die(mysql_error());

mysql_select_db('sortclass',$link);

mysql_query("set names 'gbk'");

//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(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);

}

function movenode($cid, $topid){

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

}

}

//函数

function back(){

echo '';

exit;

}

//生成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,'`class`');

$op = !empty($_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();

?>

添加分类

名称: 添加到:=makeselect($category,'pid')?>

移动分类

=makeselect($category,'who')?>移动到:=makeselect($category,'to')?>

'.$tree->getlayer($id, '|－ ').$tree->getvalue($id).' del edit ';

}

?>

完整的新闻无限级分类代码,可添加,删除,移动,修改

顶极节点 del edit

|－ 1级分类del edit

|－ 1级分类 del edit

|－ 1级分类 del edit

|－ |－ 2级分类 del edit

|－ |－ |－ 3级分类 del edit

|－ |－ |－|－ 4级分类 del edit

|－ 1级分类 del edit