这是我的对象使用 print_r 时的样子(这是 PHP SDK 为 Amazon Web Services Simple DB 返回的对象。

[GetAttributesResult] => CFSimpleXML Object
            (
                [Attribute] => Array
                    (
                        [0] => CFSimpleXML Object
                            (
                                [Name] => data_datein
                                [Value] => 2011-04-23
                            )

                        [1] => CFSimpleXML Object
                            (
                                [Name] => data_estatus
                                [Value] => 0
                            )

                        [2] => CFSimpleXML Object
                            (
                                [Name] => data_status
                                [Value] => 1
                            )

                        [3] => CFSimpleXML Object
                            (
                                [Name] => data_title
                                [Value] => Company Info
                            )

                        [4] => CFSimpleXML Object
                            (
                                [Name] => data_tags
                                [Value] => firsttag
                            )

                        [5] => CFSimpleXML Object
                            (
                                [Name] => data_tags
                                [Value] => secondtag
                            )

                        [6] => CFSimpleXML Object
                            (
                                [Name] => data_tags
                                [Value] => thirdtag
                            )

                        [7] => CFSimpleXML Object
                            (
                                [Name] => data_files
                                [Value] => company_info.flv
                            )

                        [8] => CFSimpleXML Object
                            (
                                [Name] => data_id
                                [Value] => 8993
                            )

                    )

            )

我有一个函数可以遍历 GetAttributesResult 对象并创建一个关联数组，这样可以很容易地通过名称引用我的字段。我的名字之一是 data_tags，重复了未知次数。我想将 data_tags 作为这些值的简单索引数组返回。这是我的函数，它不起作用。

function attrToArray($select) { 
$results = array(); 
$x = 0; 
foreach($select->body->GetAttributesResult as $result) { 
    foreach ($result as $field) { 
        if (array_key_exists($field,$results[$x])) {
            $results[$x][ (string) $field->Name ][] = (string) $field->Value;
        } else {
            $results[$x][ (string) $field->Name ] = (string) $field->Value; 
        }
    } 
    $x++; 
} 
return $results; 
}

我不知道这是否是最优雅的解决方案，但我不明白为什么它行不通。 array_key_exists 不返回 true。我错误地能够测试为 in_array($field-Name,$results[$x])并构建了我重复的 $field->Name 值的数组...但它还将所有其他值转换为单个项目嵌套数组...所以看起来它返回的 true 比我想象的要多。虽然那里的连字符是错误的，但我打算使用 -> 它不会返回 true ...所以我对那里发生的事情感到非常困惑。这是显示返回内容的 print_r。

Array ( [0] => Array ( 
[data_datein] => 2011-04-23 
[data_estatus] => 0 
[data_status] => Array ( [0] => 1 ) 
[data_title] => Array ( [0] => Company Info ) 
[data_tags] => Array ( 
    [0] => firsttag
    [1] => secondtag 
    [2] => thirdtag ) 
[data_files] => Array ( [0] => company_info.flv ) 
[data_id] => Array ( [0] => 8993 ) ) ) 

关于我如何更好地处理这个问题的任何指示、建议或说明......至少如果有人能弄清楚我如何在没有其他非冗余字段上的嵌套数组的情况下到达上述数组。非常感谢!

这是 print_r()的 $result CFSimpleXML 对象 ( [属性] => 数组 ( [0] => CFSimpleXML 对象 ( [名称] => data_datein [值] => 2011-04-23 )

        [1] => CFSimpleXML Object
            (
                [Name] => data_estatus
                [Value] => 0
            )

        [2] => CFSimpleXML Object
            (
                [Name] => data_title
                [Value] => 0001 01 Company Name
            )

        [3] => CFSimpleXML Object
            (
                [Name] => data_status
                [Value] => 1
            )

        [4] => CFSimpleXML Object
            (
                [Name] => data_tags
                [Value] => good stuff
            )

        [5] => CFSimpleXML Object
            (
                [Name] => data_tags
                [Value] => save tags
            )

        [6] => CFSimpleXML Object
            (
                [Name] => data_tags
                [Value] => tagger works
            )

        [7] => CFSimpleXML Object
            (
                [Name] => data_files
                [Value] => 0001_01_company_name.flv
            )

        [8] => CFSimpleXML Object
            (
                [Name] => data_id
                [Value] => yFKwIxjIhH
            )

    )

)

这是一个 print_r()的 $field (迭代并由 <hr> 标记分隔。)

  CFSimpleXML Object
  (
      [Name] => data_datein
      [Value] => 2011-04-23
  )
  <hr>CFSimpleXML Object
  (
      [Name] => data_estatus
      [Value] => 0
  )
  <hr>CFSimpleXML Object
  (
      [Name] => data_title
      [Value] => 0001 01 Company Name
  )
  <hr>CFSimpleXML Object
  (
      [Name] => data_status
      [Value] => 1
  )
  <hr>CFSimpleXML Object
  (
      [Name] => data_tags
      [Value] => good stuff
  )
  <hr>CFSimpleXML Object
  (
      [Name] => data_tags
      [Value] => save tags
  )
  <hr>CFSimpleXML Object
  (
      [Name] => data_tags
      [Value] => tagger works
  )
  <hr>CFSimpleXML Object
  (
      [Name] => data_files
      [Value] => 0001_01_company_name.flv
  )
  <hr>CFSimpleXML Object
  (
      [Name] => data_id
      [Value] => yFKwIxjIhH
  )

最佳答案

在 AWS PHP SDK 中，您可以使用 to_json() , to_stdClass()甚至 to_array()从 CFSimpleXML 对象中取回其他数据类型。对于 SimpleXML 对象，类型转换也是关键!

PHP 有一个名为 ArrayObject 的对象，它或多或少是数组的 OOP 版本。当您调用 CFSimpleXML->to_array() 时，您会得到一个 CFArray 对象，它用额外的功能包装了原生 ArrayObject 对象。

$array = $response->body->GetAttributesResult->to_array();
list($name, $value) = $array['Attribute']->first()->map(function($node, $i) {
    return (string) $node;
});

http://docs.amazonwebservices.com/AWSSDKforPHP/latest/#i=CFSimpleXML http://docs.amazonwebservices.com/AWSSDKforPHP/latest/#i=CFArray

关于php - 遍历 SimpleXML 对象 PHP，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5778444/