使用 simplexml 解析 xml 文件并访问属性

Question

我正在尝试解析具有以下结构的 xml 文件：

<?xml version="1.0" encoding="UTF-8" ?> 
- <uclassify xmlns="http://api.uclassify.com/1/ResponseSchema" version="1.00">
  <status success="true" statusCode="2000" /> 
- <readCalls>
- <classify id="cls1">
- <classification>
  <class className="Arts" p="0.920034" /> 
  <class className="Business" p="2.81823e-005" /> 
  <class className="Computers" p="0.0040341" /> 
  <class className="Games" p="0.00846496" /> 
  <class className="Health" p="0.00203198" /> 
  <class className="Home" p="0.00136572" /> 
  <class className="Recreation" p="0.000526926" /> 
  <class className="Science" p="0.000160703" /> 
  <class className="Society" p="0.0611354" /> 
  <class className="Sports" p="0.00221835" /> 
  </classification>
  </classify>
  </readCalls>
  </uclassify>

我正在尝试访问类中的属性 className 和 p。 这是我到目前为止所拥有的代码：

$resXml = simplexml_load_file($requestUrl); //$requestUrl is where the xml file is located
$children = $resXml->children('http://api.uclassify.com/1/ResponseSchema');

foreach ($children->readCalls->classify->classification->class as $d) {
    $currClassificationName = $d['className'];
    $currClassificationRating = (float) $d['p'];
    echo "$currClassificationName: $currClassificationRating" . "</br>";
}

这是输出：

: 0
: 0
: 0
: 0
: 0
: 0
: 0
: 0
: 0

我想要得到的输出是：

Arts: 0.920034
Business: 2.81823e-005 
  ... 
Society: 0.0611354
Sports: 0.00221835

一段时间以来一直在尝试不同的事情，但无法弄清楚这一点。请帮忙。

Answer 1

试试这个：

$resXml = simplexml_load_file($requestUrl); //$requestUrl is where the xml file is located

foreach ($resXml->readCalls->classify->classification->class as $d) {
    $currClassificationName = $d['className'];
    $currClassificationRating = (float) $d['p'];
    echo "$currClassificationName: $currClassificationRating" . "</br>";
}