记录一次遍历子菜单的功能

公司开发一个菜单功能,要求遍历子级,找了半天没有找到合适的 , 于是就复制某人的代码拿过来用了 , 记录一下防止下次找不到 , 真香!!!

• 调用方法:

$this->buildTree($arrays,0,'parent_id')

    public function buildTree($rows, $rootId, $pidKey, $childrenKey = "children")
    {
        $child = $this->findChild($rows, $rootId, $pidKey);
        if (empty($child)) {
            return null;
        }

        foreach ($child as $key => $value) {
            $resTree = $this->buildTree($rows, $value['id'], $pidKey, $childrenKey);
            if (null != $resTree) {
                $child[$key][$childrenKey] = $resTree;
            }
        }
        return $child;
    }

    private function findChild(&$arr, $id, $pidKey)
    {
        $child = [];
        foreach ($arr as $key => $value) {
            if ($value[$pidKey] == $id) {
                $child[] = $value;
            }
        }
        return $child;
    }