0

我正在尝试让 PHP 将嵌套数组转换为 XML 文档。我一直无法解决为什么没有子元素的数组完全从 XML 输出中隐藏;我希望他们在 XML 中也显示为没有孩子。

这是相关的代码片段:

private function response_xml_encode($node, $data)
{
  if ($node == null) return false;
  if (!is_array($data)) return false;
  foreach ($data as $key => $value)
  {
    if (is_array($value) && !$this->response_xml_encode_assocarray($value))
    {
      foreach ($value as $val)
        $node->addChild($key, htmlentities($val));
    }
    else if (is_array($value))
    {
      $this->response_xml_encode($node->addChild($key), $value);
    }
    else if (!$this->response_xml_encode_validkey($key))
    {
      $subnode = $node->addChild($node->getName(), htmlentities($value));
      $subnode->addAttribute('keyinvalid', 'true');
      $subnode->addAttribute('key', htmlentities($key));
    }
    else
    {
      $node->addChild($key, htmlentities($value));
    }
  }
}

private function response_xml_encode_assocarray($arr)
{
  // Let's us know if this array has associative key value pairs, or if it has numeric key value pairs
  // Returns TRUE if this array has any non-numeric key in it
  foreach ($arr as $key => $value)
  {
    if (!is_numeric($key)) return true;
  }
  return false;
}

private function response_xml_encode_validkey($key)
{
  if (strpos('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_', substr($key, 0, 1)) === false) return false;
  return (preg_match('/[^A-Za-z_-]/s', $key) === 0);
}

然后我使用以下方法调用它:

$response = array(
  'result' => 0,
  'message' => 'Success.',
  'function' => 'test',
  'data' => array(
    'GET'  => $_GET,
    'POST' => $_POST,
    'foo'  => array(
      'bar' => array(
        'bad' => array(
          'wolf' => array(
            'some_value' => 'testtesttest'
          )
        )
      )
    )
  )
);
$root = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8"?><response/>');
$this->response_xml_encode($root, $response);
return $root->asXML();

请注意,$_GETand$_POST是空数组。

以下是返回的内容:

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <result>0</result>
  <message>Success.</message>
  <function>test</function>
  <data>
    <foo>
      <bar>
        <bad>
          <wolf>
            <some_value>testtesttest</some_value>
          </wolf>
        </bad>
      </bar>
    </foo>
  </data>
</response>

但预期的是它会在它显示<GET/>之前<POST/>显示<foo>

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <result>0</result>
  <message>Success.</message>
  <function>test</function>
  <data>
    <GET/>
    <POST/>
    <foo>
      <bar>
        <bad>
          <wolf>
            <some_value>testtesttest</some_value>
          </wolf>
        </bad>
      </bar>
    </foo>
  </data>
</response>
4

1 回答 1

1

您必须在foreach循环的开头放置以下代码片段

foreach ($data as $key => $value)
{    
   if(array_key_exists($key, $data) && empty($value))
   {
       $node->addChild($key, "");
   }
   //your other code goes here
}

上面的代码将输出您想要的输出,如下所示。

<?xml version="1.0" encoding="UTF-8"?>
<response>
    <result>
    </result>
    <message>Success.</message>
    <function>test</function>
    <data>
        <GET>
        </GET>
        <POST>
        </POST>
        <foo>
            <bar>
                <bad>
                    <wolf>
                        <some_value>test test test</some_value>
                    </wolf>
                </bad>
            </bar>
        </foo>
    </data>
</response>

我已将您的代码作为示例,并通过创建一个类来执行它。所以这也应该对你有用。

于 2013-05-10T11:53:36.547 回答