Question

我正在创建路由应用程序，并将结果作为json数组获取。将其转换为php数组后，我正确地获得了整个距离和整个持续时间。现在，我也需要键“腿”中的每个值的距离和持续时间，但我所做的所有操作都无法获得数据。

数组的json输出如下：

array (
  'routes' => 
  array (
    0 => 
    array (
      'legs' => 
      array (
        0 => 
        array (
          'summary' => '',
          'weight' => 3741.9,
          'duration' => 2912.3, // This value is what i want access
          'steps' => 
          array (
          ),
          'distance' => 21603.1, // This value is what i want access
        ),
        1 => 
        array (
          'summary' => '',
          'weight' => 3642.1,
          'duration' => 2777.4, // This value is what i want access
          'steps' => 
          array (
          ),
          'distance' => 21611.8, // This value is what i want access
        ),
      ),
      'weight_name' => 'routability',
      'weight' => 7384,
      'duration' => 5689.700000000001, // This value i can acesss
      'distance' => 43214.899999999994, // This value i can acesss too
    ),
  ),
  'waypoints' => 
  array (
    0 => 
    array (
      'hint' => '',
      'distance' => 16.78277948979663, // This value is what i want access
      'name' => 'Weg',
      'location' => 
      array (
        0 => 11.4623,
        1 => 50.7126,
      ),
    ),
    1 => 
    array (
      'hint' => '',
      'distance' => 16.62835508134535,
      'name' => 'Weg',
      'location' => 
      array (
        0 => 12.6069,
        1 => 51.5398,
      ),
    ),
    2 => 
    array (
      'hint' => '',
      'distance' => 16.78277948979663,
      'name' => 'Weg',
      'location' => 
      array (
        0 => 12.343,
        1 => 51.576,
      ),
    ),
  ),
  'code' => 'Ok',
)

我通过以下代码获得了总距离（43214.8）和整个持续时间（5689.7）：

foreach($res2['routes'] as $item) 
{
    $distances = array_push_assoc($distances, $item['distance'], $item['duration']);
}

为了获得距离和持续时间，我做了以下事情：

foreach($res2['routes']['legs'] as $item) 
{
    $durations = array_push_assoc($durations , "DUR", $item['duration']);
}

我如何从“腿”获得距离和持续时间？为什么要执行$ res2 ['routes'] ['legs']？

谢谢！

Answer 1

请注意，“腿”数组存在于“路线”数组的索引0中，因此要在其上循环将需要使用$res2['routes'][0]['legs']。

此外，请注意，array_push_assoc与相同的硬编码密钥（如示例中的“ DUR”）一起循环使用会每次均覆盖该密钥，因此您的数据会丢失-您最好将其更改为： / p>

foreach($res2['routes'][0]['legs'] as $item) {
    $durations[] = $item['duration'];
}

如何通过定义特定键来访问php嵌套数组中的所有值？

1 个答案: