如何使用PHP访问关联数组中的值 [英] How To Access Values In Associative Array Using PHP

问题描述

我有一个数组，该数组是使用Amazon SimpleDb进行选择查询的结果.

I have an array which is the result of a select query using Amazon SimpleDb.

这是我print_r($ result);时的示例数据；

Here is sample data when I print_r($result);

Array ( [0] => Array ( [Name] => 5140ede647e74
                       [Attributes] => Array (
                            [0] => Array ( [Name] => test_id [Value] => 5140ede647e74 )
                            [1] => Array ( [Name] => test_name [Value] => test1 )
                            [2] => Array ( [Name] => last_update [Value] => 1363209702 )
                            [3] => Array ( [Name] => created [Value] => 1363209702 ) ) ) ) 

如果我要提取test_id和test_name，该怎么办?我目前正在执行以下操作

If I want to extract the test_id and the test_name, how can I do it? I am currently doing the following

<?php foreach ($result as $item) {
    echo $item['Attributes'][0]['Value']; 
    echo $item['Attributes'][1]['Value'];
} ?>

但是我想通过引用"test_id"和"test_name"来做到这一点，因为当我删除数据所在的域并重新输入数据时，每个属性的顺序都会改变，所以我不相信$ item ['Attributes'] [0] ['Value']将始终为test_id

But I want to do it by referencing "test_id" and "test_name" because when I delete the domain where the data resides and re-enter the data, the order of each attribute can change so I can't trust that $item['Attributes'][0]['Value'] will always be the test_id

谢谢！

推荐答案

foreach ($result as $item) {
  foreach ($item['Attributes'] as $keyvalue) {
    if ($keyvalue['Name'] == 'test_id' || $keyvalue['Name'] == 'test_name') {
      echo $keyvalue['Value'];
    }
  }
}

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