Question

如何删除所有节点，如xml：space =＆＃34;保留＆＃34;来自XML，以获得干净的结果

旧XML

<table>
<actor xml:space="preserve"> </actor>
</table>

我希望结果像这样

<table>
<actor> </actor>
</table>

修改

这是php代码

function produce_XML_object_tree($raw_XML) {
    libxml_use_internal_errors(true);
    try {
        $xmlTree = new SimpleXMLElement($raw_XML);
    } catch (Exception $e) {
        // Something went wrong.
        $error_message = 'SimpleXMLElement threw an exception.';
        foreach(libxml_get_errors() as $error_line) {
            $error_message .= "\t" . $error_line->message;
        }
        trigger_error($error_message);
        return false;
    }
    return $xmlTree;
}
$xml_feed_url = "www.xmlpage.com/web.xml";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $xml_feed_url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$xml = curl_exec($ch);
curl_close($ch);

$cont = produce_XML_object_tree($xml);

echo json_encode($cont);

Answer 1

使用xpath表达式找到属性并将其删除。

实施例

//$xml = your xml string

$dom = new DOMDocument();
$dom->loadXML($xml);
$xpath = new DOMXPath($dom);

foreach ($xpath->query('//@xml:space') as $attr) {
    $attr->ownerElement->removeAttributeNode($attr);
}

echo $dom->saveXML();

输出：

<?xml version="1.0"?>
<table>
<actor> </actor>
</table>

这将删除任何xml：space属性。如果您只想定位值为“preserve”的xml：space属性，请将查询更改为//@xml:space[.="preserve"]。

Answer 2

$ string = str_ireplace（＆＃39; xml：space =＆＃34;保留＆＃34;＆＃39;，＆＃39;＆＃39;，$ string）;

function produce_XML_object_tree($raw_XML) {
    libxml_use_internal_errors(true);
    try {
        $xmlTree = new SimpleXMLElement($raw_XML);
    } catch (Exception $e) {
        // Something went wrong.
        $error_message = 'SimpleXMLElement threw an exception.';
        foreach(libxml_get_errors() as $error_line) {
            $error_message .= "\t" . $error_line->message;
        }
        trigger_error($error_message);
        return false;
    }
    return str_ireplace('xml:space="preserve"','',$xmlTree;);
}
$xml_feed_url = "www.xmlpage.com/web.xml";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $xml_feed_url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$xml = curl_exec($ch);
curl_close($ch);

$cont = produce_XML_object_tree($xml);

echo json_encode($cont);

Answer 3

只要您关注删除所有带有命名空间前缀的属性节点，就可以通过xpath选择它们并从XML文档中删除它们。

可以通过将名称（前缀和本地名称）与本地名称（仅限本地名称）进行比较来获取具有前缀的所有属性的xpath查询。如果它不同，你就有了匹配：

//@*[name(.) != local-name(.)]

使用SimpleXML和XPath查询特定节点以删除它们outlined earlier as an answer问题为Remove a child with a specific attribute, in SimpleXML for PHP (Nov 2008)，使用 SimpleXML-Self-Reference 非常简单：

$xml = simplexml_load_string($buffer);
foreach ($xml->xpath('//@*[name(.) != local-name(.)]') as $attr) {
    unset($attr[0]);
}

此处的自我引用是通过$attr删除属性$attr[0]。

完整示例：

$buffer = <<<XML
<table>
<actor class="foo" xml:space="preserve"> </actor>
</table>
XML;

$xml = simplexml_load_string($buffer);
foreach ($xml->xpath('//@*[name(.) != local-name(.)]') as $attr) {
    unset($attr[0]);
}
echo $xml->asXML();

示例输出：

<?xml version="1.0"?>
<table>
<actor class="foo"> </actor>
</table>

使用PHP清理XML清理[xml：space]

3 个答案:

实施例

输出：