遞歸遍歷

數據格式：　"data": [{"label": "技術部","id": "1","parent_id": "0","children": [{"label": "財務部","id": "22","parent_id": "1"},{"label": "菜鳥部","id": "3","parent_id": "1","children": [{"label": "人事部","id": "4","parent_id": "3"}]}]}????］ /*** 分類樹狀圖** @param $request* @return mixed*/ public function index($request) {//如果數據太大，建議分批獲取數據$collection = $this->model->select('name as label', 'id', 'parent_id')->get()->toArray();return $this->getDepartments($collection); }/*** 遞歸獲取部門** @param $name* @param $collection* @param string $parentId* @param null $item* @return array*/ public function getDepartments(&$collection, $parentId = '0', &$item = null, $name = 'children') {$tree = [];foreach ($collection as $key => $value) {if ($value['parent_id'] == $parentId) {self::shiftCollection($collection, $value, $key);if ($item) $item[$name][] = $value;else $tree[] = $value;}};return $tree; }/*** 刪除已分配的元素(可減少循環, 減少內存占用)** @param $key* @param $collection* @param $value*/ public function shiftCollection(&$collection, &$value, $key) {unset($collection[$key]);self::getDepartments($collection, $value['id'], $value); }

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