php无限分类

public function CycleData($parent_id=0){
$where['parent_id']= $parent_id;
$res = $this->m->where($where)->field('id,name')->select();
foreach($res as $k=>$v){
$result[$v['id']]['id'] = $v['id'];
$result[$v['id']]['name'] = $v['name'];

$r = $this->GametypeOpt($v['id']);
foreach($r as $kk=>$vv){
$result[$vv['id']]['id']     = $vv['id'];
$result[$vv['id']]['name']     = "-|  ".$vv['name'];
}

}
return $result;

}

// 无限循环数据
public function CycleData($parent_id=0){
$where['parent_id']= $parent_id;
$res = $this->m->where($where)->field('id,name')->select();
foreach($res as $k=>$v){
$result[$v['id']]['id'] = $v['id'];
$result[$v['id']]['name'] = $v['name'];
//$opt[$v['id']] .= "<option value='".$v['id']."'>".$v['name']."</option>";

$r = $this->CycleData($v['id']);
foreach($r as $kk=>$vv){
$result[$vv['id']]['id']     = $vv['id'];
$result[$vv['id']]['name']     = "    |-  ".$vv['name'];
//$opt[$vv['id']] .= "<option value='".$vv['id']."'>".$vv['name']."</option>";
}

}
return $result;

}
// 无限循环opt
public function GametypeOpt($parent_id=0,$val){
$list = $this->CycleData($parent_id);
$opt .= "<option value='0'>顶级分类</option>";
foreach($list as $k=>$v){
if($v['id'] = $val){
$opt .= "<option value='".$v['id']."' selected='selected'>".$v['name']."</option>";
}else{
$opt .= "<option value='".$v['id']."'>".$v['name']."</option>";
}

}
return $opt;
}

public function CycleData($parent_id=0){
$res = $this->Catedata($parent_id);
if(empty($res)) return false;
foreach($res as $k=>$v){
$result[$v['id']]['id'] = $v['id'];
$result[$v['id']]['name'] = $v['name'];
$result[$v['id']]['parent_id'] = $v['parent_id'];

$rf = $this->CycleData($v['id']);
if($rf){
foreach($rf as $k=>$vv){
$result[$vv['id']]['id'] = $vv['id'];
$result[$vv['id']]['name'] = "   |- ".$vv['name'];
$result[$vv['id']]['parent_id'] = $vv['parent_id'];
}
}
}
return $result;
}

array(
'1' => array(
'id' => '1',
'parent_id' => '0',
'name' =>'顶级分类一'
),
'2' => array(
'id' => '2',
'parent_id' => '1',
'name' =>'   |-    二级分类一'
),
'4' => array(
'id' => '4',
'parent_id' => '2',
'name' =>'    |-      |-     三级分类一'
),
'5' => array(
'id' => '1',
'parent_id' => '0',
'name' =>'顶级分类一'
),
'3' => array(
'id' => '3',
'parent_id' => '5',
'name' =>'    |-     三级分类一'
),

);

Array
(
[1] => Array
(
[id] => 1
[name] => 1
[child] => Array
(
[3] => Array
(
[id] => 3
[name] => 23523
[child] => Array
(
[2] => Array
(
[id] => 2
[name] => 234234
[child] =>
)

)

)

)

)

[5] => Array
(
[id] => 5
[name] => 234234
[child] => Array
(
[4] => Array
(
[id] => 4
[name] => 12302
[child] =>
)

)

)

)

public function CycleData($parent_id=0){
$where['parent_id']= $parent_id;
$res = db('category')->where($where)->select();

if(empty($res)) return false;

foreach($res as $k=>$v){
$result[$v['id']]['id'] = $v['id'];
$result[$v['id']]['name'] = $v['name'];
$result[$v['id']]['child']  = $this->CycleData($v['id']);

}
return $result;
}