php实现无限级分类

author: askie blog: http://www.pkphp.com 版权： 随便用 无限分类

/**
* author: askie
* blog: http://www.pkphp.com
* 版权： 随便用
* 无限分类
*/
class Tree
{
public $data=array();
public $cateArray=array();

function Tree()
{

}
function setNode ($id, $parent, $value)
{
$parent = $parent?$parent:0;
$this->data[$id] = $value;
$this->cateArray[$id] = $parent;
}
function getChildsTree($id=0)
{
$childs=array();
foreach ($this->cateArray as $child=>$parent)
{
if ($parent==$id)
{
$childs[$child]=$this->getChildsTree($child);
}

}
return $childs;
}
function getChilds($id=0)
{
$childArray=array();
$childs=$this->getChild($id);
foreach ($childs as $child)
{
$childArray[]=$child;
$childArray=array_merge($childArray,$this->getChilds($child));
}
return $childArray;
}
function getChild($id)
{
$childs=array();
foreach ($this->cateArray as $child=>$parent)
{
if ($parent==$id)
{
$childs[$child]=$child;
}
}
return $childs;
}
//单线获取父节点
function getNodeLever($id)
{
$parents=array();
if (key_exists($this->cateArray[$id],$this->cateArray))
{
$parents[]=$this->cateArray[$id];
$parents=array_merge($parents,$this->getNodeLever($this->cateArray[$id]));
}
return $parents;
}
function getLayer($id,$preStr=’-’)
{
return str_repeat($preStr,count($this->getNodeLever($id)));
}
function getValue ($id)
{
return $this->data[$id];
} // end func
}

$Tree = new Tree(”请选择分类”);
//setNode(目录ID,上级ID，目录名字);
$Tree->setNode(1, 0, ‘目录1′);
$Tree->setNode(2, 1, ‘目录2′);
$Tree->setNode(5, 3, ‘目录5′);
$Tree->setNode(3, 0, ‘目录3′);
$Tree->setNode(4, 2, ‘目录4′);
$Tree->setNode(9, 4, ‘目录9′);
$Tree->setNode(6, 2, ‘目录6′);
$Tree->setNode(7, 2, ‘目录7′);
$Tree->setNode(8, 3, ‘目录8′);

//print_r($Tree->getChildsTree(0));
//print_r($Tree->getChild(0));
//print_r($Tree->getLayer(2));

$category = $Tree->getChilds();

//遍历输出
foreach ($category as $key=>$id)
{
echo $id.$Tree->getLayer($id, ‘-’).$Tree->getValue($id).”\n”;
}

?>