SimpleXML将这些节点实现为数组。如果你var_dump()这样做,你会看到类似的东西:
// Dump the whole Attributes array
php > var_dump($xml->Attributes);
object(SimpleXMLElement)#6 (1) {
  ["Attribute"]=>
  array(3) {
    [0]=>
    object(SimpleXMLElement)#2 (3) {
      ["Name"]=>
      string(8) "bedrooms"
      ["DisplayName"]=>
      string(8) "Bedrooms"
      ["Value"]=>
      string(10) "4 bedrooms"
    }
    [1]=>
    object(SimpleXMLElement)#5 (3) {
      ["Name"]=>
      string(9) "bathrooms"
      ["DisplayName"]=>
      string(9) "Bathrooms"
      ["Value"]=>
      string(11) "2 bathrooms"
    }
    [2]=>
    object(SimpleXMLElement)#3 (3) {
      ["Name"]=>
      string(13) "property_type"
      ["DisplayName"]=>
      string(13) "Property type"
      ["Value"]=>
      string(5) "House"
    }
  }
}
因此,只需通过数组索引访问特定的问题:
// Get the second Attribute node
var_dump($xml->Attributes[0]->Attribute[1]);
object(SimpleXMLElement)#6 (3) {
  ["Name"]=>
  string(9) "bathrooms"
  ["DisplayName"]=>
  string(9) "Bathrooms"
  ["Value"]=>
  string(11) "2 bathrooms"
}
根据孩子的值获取属性节点:
使用您可以根据孩子的文本值xpath()查询父节点:Attribute
// Get the Attribute containing the Bathrooms DisplayName
// Child's text value is queried via [AttrName/text()="value"]
var_dump($xml->xpath('//Attributes/Attribute[DisplayName/text()="Bathrooms"]');
array(1) {
  [0]=>
  object(SimpleXMLElement)#6 (3) {
    ["Name"]=>
    string(9) "bathrooms"
    ["DisplayName"]=>
    string(9) "Bathrooms"
    ["Value"]=>
    string(11) "2 bathrooms"
  }
}