无极分类

/**
 * @param $data 数组
 * @param $pId 父级ID
 * @return unknown
 */
function getTree($data, $pId)
{
    $tree = [];
    foreach($data as $k => $v)
    {
        if($v['parent_id'] == $pId)
        {        //父亲找到儿子
            $v['parent_id'] = self::getTree($data, $v['class_id']);
            $tree[] = $v;
        }
    }
    return self::tree($tree);
}

/**
 * 将树形转化为数组
 */
static private function tree($data, $count = 0)
{
    foreach ($data as $value) {
        $value['level'] = $count;
        if (isset($value['child'])) {
            $child = $value['child'];
            unset($value['child']);
            self::$treeList[] = $value;
            self::tree($child, $count + 1);
        } else {
            self::$treeList[] = $value;
        }
    }
    return self::$treeList;
}

转载于:https://my.oschina.net/mafighting/blog/1810317