SimpleXML 无法找到命名空间元素

发布于 2024-10-10 02:59:51 字数 1961 浏览 5 评论 0原文

我似乎无法让 PHP 的 SimpleXML 类识别 XHTML 文档中带前缀的命名空间元素。这是我的示例：

test.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:zuq="http://localhost/zuq">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>

<body>
    <h1>Heading</h1>
    <p>Paragraph</p>
    <zuq:region name="myRegion">
        <div class="myClass">
            <h1><zuq:data name="myDataHeading" /></h1>
            <p><zuq:data name="myDataParagraph" /></p>
        </div>
    </zuq:region>
</body>
</html>

当我执行以下操作时：

$sxml = simplexml_load_file('test.html');
print_r($sxml);

它返回：

SimpleXMLElement Object
(
    [head] => SimpleXMLElement Object
        (
            [meta] => SimpleXMLElement Object
                (
                    [@attributes] => Array
                        (
                            [http-equiv] => Content-Type
                            [content] => text/html; charset=utf-8
                        )

                )

            [title] => Untitled Document
        )

    [body] => SimpleXMLElement Object
        (
            [h1] => Heading
            [p] => Paragraph
        )

)

但是当我执行以下操作时：

$sxml = simplexml_load_file('test.html');
$sxml_zuq = $sxml->children('zuq', true);
print_r($sxml_zuq);

它返回空：

SimpleXMLElement Object
(
)

使用 foreach 迭代对象，否则不会似乎不起作用，并且在 children() 中使用 URI 而不是前缀也会失败。

我显然在某个地方犯了错误，但我不确定在哪里，因为我的尝试与我在阅读中遇到的许多教程示例完全相同。

这是怎么回事？

原文

I can't seem to get PHP's SimpleXML class to recognize prefixed namespace elements in an XHTML document. Here's my example:

test.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:zuq="http://localhost/zuq">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>

<body>
    <h1>Heading</h1>
    <p>Paragraph</p>
    <zuq:region name="myRegion">
        <div class="myClass">
            <h1><zuq:data name="myDataHeading" /></h1>
            <p><zuq:data name="myDataParagraph" /></p>
        </div>
    </zuq:region>
</body>
</html>

When I do the following:

$sxml = simplexml_load_file('test.html');
print_r($sxml);

It returns:

SimpleXMLElement Object
(
    [head] => SimpleXMLElement Object
        (
            [meta] => SimpleXMLElement Object
                (
                    [@attributes] => Array
                        (
                            [http-equiv] => Content-Type
                            [content] => text/html; charset=utf-8
                        )

                )

            [title] => Untitled Document
        )

    [body] => SimpleXMLElement Object
        (
            [h1] => Heading
            [p] => Paragraph
        )

)

But when I do the following:

$sxml = simplexml_load_file('test.html');
$sxml_zuq = $sxml->children('zuq', true);
print_r($sxml_zuq);

It returns empty:

SimpleXMLElement Object
(
)

Iterating through the object with foreach or otherwise doesn't seem to work, and using the URI rather than the prefix in children() also fails.

I've obviously made a mistake somewhere, but I'm not sure where, as my attempt is quite identical to many tutorial examples I've come across in my reading.

What's going on here?

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于我来说 2024-10-17 02:59:51

children() 只提供上下文节点的[直接]子节点，而不是后代节点。

$html = simplexml_load_file('test.html');

// get <body/>'s children
$html->body->children('zuq', true);

// use XPath to get all zuq:* nodes
$html->xpath('//zuq:*');

children() only gives you the [direct] children of the context node, not descendants.

$html = simplexml_load_file('test.html');

// get <body/>'s children
$html->body->children('zuq', true);

// use XPath to get all zuq:* nodes
$html->xpath('//zuq:*');

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錯遇了你 2024-10-17 02:59:51

仅供参考，如果名称空间定义 xmlns:zuq="http://localhost/zuq" 在实际 xml 元素而不是根节点中声明，那么我们必须另外调用 registerXPathNamespace 函数，然后使用 xpath，如http://www.dimuthu.org/blog/2008/ 09/30/xpath-in-simplexml/

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