php工具类之【tree类】
class Tree {var $data = array();
var $child = array(-1 => array());
var $layer = array(-1 => -1);
var $parent = array();
var $countid = 0;
function Tree($value='') {}
function setNode($id, $parent, $value) {
$parent = $parent?$parent:0;
$this->data[$id] = $value;
$this->child[$parent][]= $id;
$this->parent[$id] = $parent;
if(!isset($this->layer[$parent])) {
$this->layer[$id] = 0;
} else {
$this->layer[$id] = $this->layer[$parent] + 1;
}
}
function getList(&$tree, $root= 0) {
if(is_array($this->child[$root] ))
{
foreach($this->child[$root] as $key => $id) {
$tree[] = $id;
if($this->child[$id]) $this->getList($tree, $id);
}
}else{
}
}
function getValue($id) {
return $this->data[$id];
}
function reSetLayer($id) {
if($this->parent[$id]) {
$this->layer[$this->countid] = $this->layer[$this->countid] + 1;
$this->reSetLayer($this->parent[$id]);
}
}
function getLayer($id, $space = false) {
$this->layer[$id] = 0;
$this->countid = $id;
$this->reSetLayer($id);
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();
$this->getList($child, $id);
return $child;
}
}
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