Question

我有一组可变长度的键名，我想使用这些名称为数组赋值

例如，我有一个列出不同品牌的汽车和自行车数量的数组：

$vehicles = [
    'cars' => Array
    (
        'suzuki' => Array
        (
            'wagon' => 4,
            'baleno' => 2
        ),
        'honda' => Array
        (
            'civic' => 6
        )
    ),
    'bikes' => array
    (
        'raleigh' => 3,
        'scott' => 3
    )
];

我还有几个键名数组以及要放在主数组中的值：

$keys1 = ['cars', 'honda', 'jazz'];
$value1 = 3;
$keys2 = ['bikes', 'scott'];
$value2 = 1;
$keys3 = ['motorbikes', 'harley-davidson', 'dyna', 'street-bob'];
$value3 = 2;

输入所有这些值后，数组应如下所示：

$vehicles = [
    'cars' => Array
    (
        'suzuki' => Array
        (
            'wagon' => 4,
            'baleno' => 2
        ),
        'honda' => Array
        (
            'civic' => 6,
            'jazz' => 3
        )
    ),
    'bikes' => array
    (
        'raleigh' => 3,
        'scott' => 1
    ),
    'motorbikes' => Array
    (
        'harley-davidson' => Array
        (
            'dyna' => Array
            (
                'street-bob' => 2
            )
        )
    )
];

因此，第一个数组会添加一个$key => $value对，其中之前没有一个。第二个替换$array2末尾的键值，最后一个在没有开始时创建一个新数组。

如何以这种方式填充数组？

eval()可以解决我的所有问题，但数组是从html创建的，因此存在巨大的安全风险。

Answer 1

构建键/值对列表的便捷方式（在我看来）如下：

onResponse

以下是使用public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View drawer = inflater.inflate(R.layout.fragment_pending, container, false); pendingnullorder = (TextView) drawer.findViewById(R.id.pendingnullorder); recyclerView = (RecyclerView) drawer.findViewById(R.id.pending); progressBar = (ProgressBar) drawer.findViewById(R.id.progressBar); /*recyclerView.setVisibility(View.GONE);*/ progressBar.setVisibility(ProgressBar.VISIBLE); recyclerView.setHasFixedSize(true); recyclerView.setLayoutManager(new LinearLayoutManager(inflater.getContext())); orderLists = new ArrayList<>(); getPendingData(); adapter = new OrderListAdapter(orderLists, inflater.getContext()); recyclerView.setAdapter(adapter); updateUI(); return drawer; } private void getPendingData() { String token = SharedPreferencesManager.readPreferenceString("token", "D/N"); JSONObject progressData = new JSONObject(); try{ progressData.put("token", token); JsonObjectRequest progressObject = new JsonObjectRequest(1, Common.OrderDetails + "progress", progressData, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject progressResponse) { Log.d("Responseprogress", progressResponse.toString()); try { int status = progressResponse.getInt("status"); if(status == 1) { progressOrderProgress(progressResponse); } } catch (JSONException e) { e.printStackTrace(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { error.printStackTrace(); Log.d("Response", "PROGRESS ERROR"); } }); progressObject.setShouldCache(false); ServiceBellApp.getInstance().addToRequestQueue(progressObject); } catch (JSONException localJSONException){ localJSONException.printStackTrace(); return; } } private void progressOrderProgress(JSONObject progressResponse) throws JSONException { JSONArray result = progressResponse.getJSONArray("orderdata"); for(int i=0; i<result.length(); i++){ OrderList orderListModule = new OrderList(); JSONObject orderData = null; try { orderData = result.getJSONObject(i); orderListModule.setPackage_name(orderData.getString("name")); orderListModule.setOrderdate(orderData.getString("date")); orderListModule.setServicedate(orderData.getString("service")); orderListModule.setServicetime(orderData.getString("time")); orderListModule.setOrderid(orderData.getString("id")); orderListModule.setOrdstatus(orderData.getString("status")); orderListModule.setOrderamount(orderData.getInt("ramount")); }catch (JSONException e) { e.printStackTrace(); } orderLists.add(orderListModule); } swipeRefreshLayout.setRefreshing(false); adapter.notifyDataSetChanged(); updateUI(); } private void updateUI() { if (adapter.getCount() == 0) { pendingnullorder.setVisibility(View.VISIBLE); recyclerView.setVisibility(View.GONE); } else { pendingnullorder.setVisibility(View.GONE); recyclerView.setVisibility(View.VISIBLE); } }函数和引用的解决方案：

// $vehicles is your initial array

$key_paths = [
  ['key_path' =>  ['cars', 'honda', 'jazz'], 'value' => 3],
  ['key_path' =>  ['bikes', 'scott'], 'value' => 1],
  ['key_path' =>  ['motorbikes', 'harley-davidson', 'dyna', 'street-bob'], 'value' => 2],
];

输出：

array_slice

Answer 2

您可以使用与$keys相同的格式转换$vehicles数组，然后以递归方式替换它们：

$vehicles = [
    'cars' => [
        'suzuki' => [
            'wagon'  => 1,
            'boleno' => 2
        ]
    ],

    'bikes' => [
        'scott' => 3
    ]

];

$keys = ['cars', 'honda', 'jazz'];
$value  = 3;

function addValues($vehicles, $keys, $value)
{
    $formatted = formatArray($keys, $value);

    return array_replace_recursive($vehicles, $formatted);
}

function formatArray($array, $value)
{
    $format = function ($carry, $item) {
        return [$item => $carry];
    };

    return array_reduce(array_reverse($array), $format, $value);
}

$vehicles = addValues($vehicles, $keys, $value);
var_dump($vehicles);

输出：

array (size=2)
  'cars' => 
    array (size=2)
      'suzuki' => 
        array (size=2)
          'wagon' => int 1
          'boleno' => int 2
      'honda' => 
        array (size=1)
          'jazz' => int 3
  'bikes' => 
    array (size=1)
      'scott' => int 3

使用键名称数组在多维数组中添加/编辑值

2 个答案: