php 递归

function digui($data,$j=0,$lev=0)
{
    $subs=array();//存放子孙数组
    foreach ($data as $v){
        if ($v['parent_id']==$j){
            $v['length']=str_repeat('    ',$lev);
            $subs[]=$v;
            $subs=array_merge($subs,$this->digui($data,$v['rule_id'],$lev+1 ));
        }

    }
    return $subs;
}

function digui($data,$j=0)
{
    $subs=array();//存放子孙数组
    foreach ($data as $v){
        if ($v['parent_id']==$j){
            $v['zi']=$this->digui($data,$v['rule_id'] );
            $subs[]=$v;
        }
    }
    return $subs;
}