$items=[
            ["num"=>17,"status"=>0,"grade"=>5],
            ["num"=>17,"status"=>2,"grade"=>4],
            ["num"=>7,"status"=>1,"grade"=>6],
            ["num"=>17,"status"=>0,"grade"=>3],
        ];
        $ucsCollect=collect($items);
        //过滤
        $ucsCollect=$ucsCollect->filter(function ($item, $key) {
            return $item['num'] > 14;
        });
        //倒叙排序
        $ucsList=$ucsCollect->sortByDesc(function ($item, $key) {
            return $item['grade'];
            //正序排序
        })->sortBy(function ($item, $key) {
            return $item['status'];
        })->toArray();
        var_dump($ucsList);