PHP循环通过XML嵌套循环，而不使用多个foreach循环？

是否有更干净的方法来实现这一点： XML是：

            <Specifics>
               <Name>
                  <Type>Brand</Type>
                  <Value>Apple</Value>
                  <Source>list</Source>
               </Name>
               <Name>
                  <Type>Country</Type>
                  <Value>USA</Value>
                  <Source>list</Source>
               </Name>
               <Name>
                  <Type>Rating</Type>
                  <Value>87</Value>
                  <Source>list</Source>
               </Name>
               <Name>
                  <Type>Project</Type>
                  <Value>Dolphin</Value>
                  <Source>list</Source>
               </Name>
               <Name>
                  <Type>Age</Type>
                  <Value>10-20</Value>
                  <Source>list</Source>
               </Name>
            </Specifics>

---

您可以使用Xpath。如果我理解正确，您希望迭代

name

元素并从其子元素读取数据。SimpleXML对xpath的支持也很有限。但是我更喜欢直接使用DOM

$dom = new DOMDocument();
$dom->loadXml($xml);
$xpath = new DOMXpath($dom);

// iterate all `Name` elements anywhere in the document
foreach ($xpath->evaluate('//Name') as $nameNode) {
  var_dump(
    [
      // fetch first `Type` element in $nameNode and cast it to string
      $xpath->evaluate('string(Type)', $nameNode),
      $xpath->evaluate('string(Value)', $nameNode),
      $xpath->evaluate('string(Source)', $nameNode)
    ]
  );
}

和ThW一样，我还要说xpath是访问

细节/名称的方法。当您标记这个simplexml时，在您的案例中还有一些简短的方法来获取命名值：

foreach ($xml->xpath('/*//Specifics/Name') as $name)
{
    print_r(array_map('strval', iterator_to_array($name)));
}

输出：

Array
(
    [Type] => Brand
    [Value] => Apple
    [Source] => list
)
Array
(
    [Type] => Country
    [Value] => USA
    [Source] => list
)
Array
(
    [Type] => Rating
    [Value] => 87
    [Source] => list
)
Array
(
    [Type] => Project
    [Value] => Dolphin
    [Source] => list
)
Array
(
    [Type] => Age
    [Value] => 10-20
    [Source] => list
)

可以使用递归迭代每个元素及其子元素。
Array
(
    [Type] => Brand
    [Value] => Apple
    [Source] => list
)
Array
(
    [Type] => Country
    [Value] => USA
    [Source] => list
)
Array
(
    [Type] => Rating
    [Value] => 87
    [Source] => list
)
Array
(
    [Type] => Project
    [Value] => Dolphin
    [Source] => list
)
Array
(
    [Type] => Age
    [Value] => 10-20
    [Source] => list
)