小馬過河﹎

$playersArray = DB::table('sign_up')
	->select('user_id', 'nickname')
	->where('order_id', '=', $request->id)
	->where('nickname', '<>', '')
	->get()
	->toarray();
$playersObj = \array_combine(array_column($playersArray, 'user_id'), \array_column($playersArray, 'nickname'));