[PHP知识库]PHP返回父子级数组结构

第一种方法：

function recursionHandleData($data)
{
    //第一步 构造数据
    $items = array();
    foreach($data as $value){
        $items[$value['id']] = $value;
    }
    //第二部 遍历数据 生成树状结构
    $tree = array();
    foreach($items as $key => $value){
        if(isset($items[$value['pid']])){
            $items[$value['pid']]['children'][] = &$items[$key];
        }else{
            $tree[] = &$items[$key];
        }
    }
    return $tree;
}

第二种方法：

function recursionHandleData($data, $pid = 0)
{
    $child = [];
    foreach ($data as $value) {
        if ($value['pid'] == $pid) {
            $child[$value['id']] = $value;
            $child[$value['id']]['children'] = recursionHandleData($data, $value['id']);
        }
    }
    return $child;
}