无平台限制 只需要告知id,parentid,name 即可
{
/**
+------------------------------------------------
- 生成树型结构所需要的2维数组
+------------------------------------------------ - @author abc
+------------------------------------------------ - @var Array
*/
var $arr = array();
/**
+------------------------------------------------
- 生成树型结构所需修饰符号,可以换成图片
+------------------------------------------------ - @author abc
+------------------------------------------------ - @var Array
*/
var $icon = array(' │',' ├',' └');
/**
- @access private
*/
var $ret = '';
/**
- 构造函数,初始化类
- @param array 2维数组,例如:
- array(
- 1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'), 2 => array('id'=>'2','name'=>'一级栏目二'), 3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'), 4 => array('id'=>'4','name'=>'二级栏目二'), 5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'), 6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'), 7 => array('id'=>'7','name'=>'三级栏目二')
- )
*/
function tree($arr=array())
{
$this->arr = $arr;
$this->ret = '';
return is_array($arr);
}
/**
- 得到父级数组
- @param int
- @return array
*/
function get_parent($myid)
{
$newarr = array();
if(!isset($this->arr[$myid])) return false;
$pid = $this->arr[$myid]['parentid'];
$pid = $this->arr[$pid]['parentid'];
if(is_array($this->arr))
{
foreach($this->arr as $id => $a)
{
if($a['parentid'] == $pid) $newarr[$id] = $a;
}
}
return $newarr;
}
/**
- 得到子级数组
- @param int
- @return array
*/
function get_child($myid)
{
$a = $newarr = array();
if(is_array($this->arr))
{
foreach($this->arr as $id => $a)
{
if($a['parentid'] == $myid) $newarr[$id] = $a;
}
}
return $newarr ? $newarr : false;
}
/**
- 得到当前位置数组
- @param int
- @return array
*/
function get_pos($myid,&$newarr)
{
$a = array();
if(!isset($this->arr[$myid])) return false;
$newarr[] = $this->arr[$myid];
$pid = $this->arr[$myid]['parentid'];
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;
}
/**
-
- 得到树型结构
-
- @author abc
- @param $myid 表示获得这个ID下的所有子级
- @param $str 生成树形结构基本代码,例如: "<option value=\$id \$select>\$spacer\$name"
- @param $sid 被选中的ID,比如在做树形下拉框的时候需要用到
- @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,$sid,$adds.$k.'',$str_group);
$number++;
}
}
return $this->ret;
}
/**
-
同上一方法类似,但允许多选
*/
function get_tree_multi($myid,$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,$adds.$k.''); $number++;
}
}
return $this->ret;
}
function have($list,$item){
return(strpos(','.$list.',','.$item.','));
}
/**
+------------------------------------------------
- 格式化数组
+------------------------------------------------ - @author abc
+------------------------------------------------
*/
function getArray($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['name'] = $spacer.' '.$a['name'];
$this->ret[$a['id']] = $a;
$fd = $adds.$k.'';
$this->getArray($id,$fd);
$number++;
}
}
return $this->ret;
}
}
$data=array(
1 => array('id'=>'1',2 => array('id'=>'2',3 => array('id'=>'3',4 => array('id'=>'4',5 => array('id'=>'5',6 => array('id'=>'6',7 => array('id'=>'7','name'=>''),8 => array('id'=>'8','name'=>'三级栏目三'),9 => array('id'=>'9','parentid'=>7,'name'=>'四级分类三'),);
$tree = new Tree;
$tree->tree($data);
// 如果使用数组,请使用 getArray方法
//$tree->getArray();
// 下拉菜单选项使用 get_tree方法
$html='<select name="tree">';
$str = "<option value=\$id \$select>\$spacer\$name";
$html .= $tree->get_tree(0,-1).'';
echo $html;
?>