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<?php
/**
+------------------------------------------------
* 通用的樹(shù)型類
+------------------------------------------------
* @author yangyunzhou@foxmail.com
+------------------------------------------------
* @date 2010年11月23日10:09:31
+------------------------------------------------
*/
class Tree
{
/**
+------------------------------------------------
* 生成樹(shù)型結(jié)構(gòu)所需要的2維數(shù)組
+------------------------------------------------
* @author yangyunzhou@foxmail.com
+------------------------------------------------
* @var Array
*/
var $arr = array();
/**
+------------------------------------------------
* 生成樹(shù)型結(jié)構(gòu)所需修飾符號(hào)，可以換成圖片
+------------------------------------------------
* @author yangyunzhou@foxmail.com
+------------------------------------------------
* @var Array
*/
var $icon = array('│','├',' └');
/**
* @access private
*/
var $ret = '';
/**
* 構(gòu)造函數(shù)，初始化類
* @param array 2維數(shù)組，例如：
* array(
* 1 => array('id'=>'1','parentid'=>0,'name'=>'一級(jí)欄目一'),
* 2 => array('id'=>'2','parentid'=>0,'name'=>'一級(jí)欄目二'),
* 3 => array('id'=>'3','parentid'=>1,'name'=>'二級(jí)欄目一'),
* 4 => array('id'=>'4','parentid'=>1,'name'=>'二級(jí)欄目二'),
* 5 => array('id'=>'5','parentid'=>2,'name'=>'二級(jí)欄目三'),
* 6 => array('id'=>'6','parentid'=>3,'name'=>'三級(jí)欄目一'),
* 7 => array('id'=>'7','parentid'=>3,'name'=>'三級(jí)欄目二')
* )
*/
function tree($arr=array())
{
$this->arr = $arr;
$this->ret = '';
return is_array($arr);
}
/**
* 得到父級(jí)數(shù)組
* @param int
* @return array
*/
function get_parent($myid)
{
$newarr = array();
if(!isset($this->arr[$myid])) return false;
$pid = $this->arr[$myid]['pid'];
$pid = $this->arr[$pid]['pid'];
if(is_array($this->arr))
{
foreach($this->arr as $id => $a)
{
if($a['pid'] == $pid) $newarr[$id] = $a;
}
}
return $newarr;
}
/**
* 得到子級(jí)數(shù)組
* @param int
* @return array
*/
function get_child($myid)
{
$a = $newarr = array();
if(is_array($this->arr))
{
foreach($this->arr as $id => $a)
{
if($a['pid'] == $myid) $newarr[$id] = $a;
}
}
return $newarr ? $newarr : false;
}
/**
* 得到當(dāng)前位置數(shù)組
* @param int
* @return array
*/
function get_pos($myid,&$newarr)
{
$a = array();
if(!isset($this->arr[$myid])) return false;
$newarr[] = $this->arr[$myid];
$pid = $this->arr[$myid]['pid'];
if(isset($this->arr[$pid]))
{
$this->get_pos($pid,$newarr);
}
if(is_array($newarr))
{
krsort($newarr);
foreach($newarr as $v)
{
$a[$v['id']] = $v;
}
}
return $a;
}
/**
* -------------------------------------
* 得到樹(shù)型結(jié)構(gòu)
* -------------------------------------
* @author yangyunzhou@foxmail.com
* @param $myid 表示獲得這個(gè)ID下的所有子級(jí)
* @param $str 生成樹(shù)形結(jié)構(gòu)基本代碼, 例如: "<option value=/$id /$select>/$spacer/$name</option>"
* @param $sid 被選中的ID, 比如在做樹(shù)形下拉框的時(shí)候需要用到
* @param $adds
* @param $str_group
*/
function get_tree($myid, $str, $sid = 0, $adds = '', $str_group = '')
{
$number=1;
$child = $this->get_child($myid);
if(is_array($child)) {
$total = count($child);
foreach($child as $id=>$a) {
$j=$k='';
if($number==$total) {
$j .= $this->icon[2];
} else {
$j .= $this->icon[1];
$k = $adds ? $this->icon[0] : '';
}
$spacer = $adds ? $adds.$j : '';
$selected = $id==$sid ? 'selected' : '';
@extract($a);
$parentid == 0 && $str_group ? eval("/$nstr = /"$str_group/";") : eval("/$nstr = /"$str/";");
$this->ret .= $nstr;
$this->get_tree($id, $str, $sid, $adds.$k.' ',$str_group);
$number++;
}
}
return $this->ret;
}
/**
* 同上一方法類似,但允許多選
*/
function get_tree_multi($myid, $str, $sid = 0, $adds = '')
{
$number=1;
$child = $this->get_child($myid);
if(is_array($child))
{
$total = count($child);
foreach($child as $id=>$a)
{
$j=$k='';
if($number==$total)
{
$j .= $this->icon[2];
}
else
{
$j .= $this->icon[1];
$k = $adds ? $this->icon[0] : '';
}
$spacer = $adds ? $adds.$j : '';
$selected = $this->have($sid,$id) ? 'selected' : '';
@extract($a);
eval("/$nstr = /"$str/";");
$this->ret .= $nstr;
$this->get_tree_multi($id, $str, $sid, $adds.$k.' ');
$number++;
}
}
return $this->ret;
}
function have($list,$item){
return(strpos(',,'.$list.',',','.$item.','));
}
/**
+------------------------------------------------
* 格式化數(shù)組
+------------------------------------------------
* @author yangyunzhou@foxmail.com
+------------------------------------------------
*/
function getArray($myid=0, $sid=0, $adds='')
{
$number=1;
$child = $this->get_child($myid);
if(is_array($child)) {
$total = count($child);
foreach($child as $id=>$a) {
$j=$k='';
if($number==$total) {
$j .= $this->icon[2];
} else {
$j .= $this->icon[1];
$k = $adds ? $this->icon[0] : '';
}
$spacer = $adds ? $adds.$j : '';
@extract($a);
$a['title'] = $spacer.' '.$a['title'];
$this->ret[$a['id']] = $a;
$fd = $adds.$k.' ';
$this->getArray($id, $sid, $fd);
$number++;
}
}
return $this->ret;
}
}
?>
php技術(shù)：PHP無(wú)限分類代碼，支持?jǐn)?shù)組格式化、直接輸出菜單兩種方式，轉(zhuǎn)載需保留來(lái)源！
鄭重聲明：本文版權(quán)歸原作者所有，轉(zhuǎn)載文章僅為傳播更多信息之目的，如作者信息標(biāo)記有誤，請(qǐng)第一時(shí)間聯(lián)系我們修改或刪除，多謝。
