foreach 仅显示第一个 xml 节点的属性

Question

我正在尝试显示每个 global_ivr_variable 的属性：

$xml = '
  <response method="switchvox.ivr.globalVariables.getList">
      <result>
           <global_ivr_variables>
               <global_ivr_variable id="1" name="cid_name" value="Smith" />
               <global_ivr_variable id="2" name="Q_ID_Global" value="COS" />
           </global_ivr_variables>
      </result>
  </response>
';

$sxml = simplexml_load_string($xml);

foreach($sxml->result->global_ivr_variables->global_ivr_variable->attributes() as $a => $b)
{
echo $a .'=' . $b . "<br>";
}

我得到的只是第一个节点的属性：

id="1"
name="cid_name"
value="Smith"

我还尝试了以下方法，但根本没有给我任何价值......

    foreach($sxml->result->global_ivr_variables as $xvar)
    {
     $a = $xvar->global_ivr_variable->id;
     $b = $xvar->global_ivr_variable->name;
     $c = $xvar->global_ivr_variable->value;
     echo 'a='.$a.', b='.$b.', c='.$c.'<br>';
    }

a=, b=, c=

感谢所有挺身而出帮助有需要的人！

Answer 1

您几乎拥有它，但您需要遍历每个 <global_ivr_variable> 元素，然后提取属性：

foreach($sxml->result->global_ivr_variables->global_ivr_variable as $variable)
{
    foreach($variable->attributes() as $a => $b)
    {
        echo $a .'=' . $b . "<br>";
    }
}

Answer 2

如果您使用 PHP 变量，这些问题通常很容易消失，因为您的代码更具可读性。

此外，您还可以通过数组表示法访问 SimpleXML 中的属性：

$variables = $sxml->result->global_ivr_variables->global_ivr_variable;

foreach ($variables as $variable)
{
    printf("%s = %s\n", $variable['name'], $variable['value']);
}

这给出了以下输出：

cid_name = Smith
Q_ID_Global = COS

正如您预先知道要查找的属性一样，使用这些名称可以使您的代码更加清晰和稳定。

但是，如果您只查找 global_ivr_variable 元素的 所有 属性，那么使用 XPath 对它们进行迭代会更容易：

$allAttributes = $sxml->xpath('//global_ivr_variable/@*');

foreach ($allAttributes as $attribute) {
    printf("%s = %s\n", $attribute->getName(), $attribute);
}

然后给出以下输出：

id = 1
name = cid_name
value = Smith
id = 2
name = Q_ID_Global
value = COS

这是完整的代码示例：

$xml = <<<XML
<response method="switchvox.ivr.globalVariables.getList">
    <result>
        <global_ivr_variables>
           <global_ivr_variable id="1" name="cid_name" value="Smith" />
           <global_ivr_variable id="2" name="Q_ID_Global" value="COS" />
        </global_ivr_variables>
    </result>
</response>
XML;

$sxml = simplexml_load_string($xml);

$variables = $sxml->result->global_ivr_variables->global_ivr_variable;

foreach ($variables as $variable)
{
    printf("%s = %s\n", $variable['name'], $variable['value']);
}

echo "----\n";

$allAttributes = $sxml->xpath('//global_ivr_variable/@*');

foreach ($allAttributes as $attribute) {
    printf("%s = %s\n", $attribute->getName(), $attribute);
}