方法：
static public function getParents($data,$id){
$arr=array();
foreach ($data as $v) {
if ($v['id']==$id) {
$arr[]=$v;
$arr=array_merge(self::getParents($data,$v['pid']),$arr);
}
}
return $arr;
}
调用：
<?php
namespace Home\Controller;
use Think\Controller;
use Home\Clas\Cate;
class IndexController extends Controller {
public function index(){
$data=array(
'0'=>array(
'id'=>1,
'pid'=>0
),
'1'=>array(
'id'=>2,
'pid'=>0
),
'2'=>array(
'id'=>3,
'pid'=>1
),
'3'=>array(
'id'=>4,
'pid'=>3
)
);
//$data=Cate::unlimitedForLevel($data);
//$data=Cate::unlimitedForLayer($data);
$data=Cate::getParents($data,4);
echo '<pre>';
print_r($data);die;
echo '</pre>';
$this->display();
}
}
效果：