Cakephp 1.3 铁路超高设置：：从数据结构提取（）

我有一个类似下面的数据结构（只是更大，这是一个片段）。我试图生成以美元格式提供的所有

technologyinctive

amount值的总和

Set:：extract

似乎是一种快速、轻松地完成这项工作的自然方式，但如果我能让它完成我认为应该做的事情，我会被诅咒的。我知道

Set:：extract

只支持XPath子集，但我想我是在这个上下文中工作的。我试过了

Set::extract( '/' . $group . '/IncentiveAmountType[incentive_amount_type_id=USD]/../TechnologyIncentive/amount', $incentives  )
Set::extract( '/' . $group . '/{n}/IncentiveAmountType[incentive_amount_type_id=USD]/../TechnologyIncentive/amount', $incentives  )

$group

值在下面的结构中计算为“Appliances”或“Building Shell”。其他组存在于数据结构的非简略版本中。我可以理解它被“建筑外壳”中的空间弄糊涂了，但它甚至不适用于“电器”。我希望我只是有点不对劲，我看不见东西了

其思想是获取一个值数组，然后对其抛出

array\u sum（）

，以获取每组的总值

谢谢你的帮助。我正在研究的数据结构如下

Array
(
  [Appliances] => Array
    (
      [875] => Array
        (
          [TechnologyIncentive] => Array
            (
              [id] => 875
              [incentive_id] => ccf4ceb8-6538-11e0-9cbb-00259028905a
              [technology_id] => d4da5c6a-6538-11e0-9cbb-00259028905a
              [amount] => 75.00
              [incentive_amount_type_id] => 0fb78496-6ad6-11e0-9cbb-00259028905a
              [is_active] => 1
            )

          [IncentiveAmountType] => Array
            (
              [id] => 0fb78496-6ad6-11e0-9cbb-00259028905a
              [incentive_amount_type_id] => USD
              [name] => $
              [description] => US Dollars
              [version] => 0
              [display] => 1
            )
        )

      [1103] => Array
        (
          [TechnologyIncentive] => Array
            (
                [id] => 1103
                [incentive_id] => ccf4c9b8-6538-11e0-9cbb-00259028905a
                [technology_id] => d4da5c6a-6538-11e0-9cbb-00259028905a
                [amount] => 50.00
                [incentive_amount_type_id] => 0fb78496-6ad6-11e0-9cbb-00259028905a
                [is_active] => 1
            )

          [IncentiveAmountType] => Array
            (
                [id] => 0fb78496-6ad6-11e0-9cbb-00259028905a
                [incentive_amount_type_id] => USD
                [name] => $
                [description] => US Dollars
                [version] => 0
                [display] => 1
            )
        )
    )

  [Building Shell] => Array
    (
      [1110] => Array
          (
            [TechnologyIncentive] => Array
              (
                [id] => 1110
                [incentive_id] => ccf4c9b8-6538-11e0-9cbb-00259028905a
                [technology_id] => d4d9b79c-6538-11e0-9cbb-00259028905a
                [amount] => 150.00
                [incentive_amount_type_id] => 0fb78496-6ad6-11e0-9cbb-00259028905a
                [is_active] => 1
              )

            [IncentiveAmountType] => Array
              (
                [id] => 0fb78496-6ad6-11e0-9cbb-00259028905a
                [incentive_amount_type_id] => USD
                [name] => $
                [description] => US Dollars
                [version] => 0
                [display] => 1
              )
          )

        [10941] => Array
          (
            [TechnologyIncentive] => Array
              (
                [id] => 10941
                [incentive_id] => ccf4ceb8-6538-11e0-9cbb-00259028905a
                [technology_id] => d4d9b79c-6538-11e0-9cbb-00259028905a
                [amount] => 40.00
                [incentive_amount_type_id] => 0fb783c4-6ad6-11e0-9cbb-00259028905a
                [is_active] => 1
              )

          [IncentiveAmountType] => Array
              (
                [id] => 0fb783c4-6ad6-11e0-9cbb-00259028905a
                [incentive_amount_type_id] => PERC
                [name] => %
                [description] => Percent
                [version] => 0
                [display] => 1
              )
          )
    )
)