一点背景：

我将SVG嵌入到另一个内部，但<!ENTITY给了我各种问题，所以我想考虑使用LIBXML_NOENT并删除所有<!ENTITY }定义。

PHP：

<?php

header('Content-Type: text/plain');
$str = file_get_contents(dirname(__FILE__) . '/test2.svg');



$document = new DOMDocument();
$document->loadXML($str);

foreach ($document->doctype->entities as $entity) {
    $entity->parentNode->removeChild($entity); // I thought this would remove the <!ENTITY declaration
}

echo $document->saveXML(); // --> I want the XML without <!ENTITY ns_svg "http://www.w3.org/2000/svg"> and <!ENTITY ns_xlink "http://www.w3.org/1999/xlink">

XML：

<?xml version="1.0" encoding="utf-8"?>
<!-- Generator: Adobe Illustrator 12.0.1, SVG Export Plug-In . SVG Version: 6.00 Build 51448)  -->
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" [
    <!ENTITY ns_svg "http://www.w3.org/2000/svg">
    <!ENTITY ns_xlink "http://www.w3.org/1999/xlink">
]>
<svg  version="1.1"
     id="Bundesschild" sodipodi:version="0.32" xmlns:cc="http://web.resource.org/cc/" xmlns:sodipodi="http://inkscape.sourceforge.net/DTD/sodipodi-0.dtd" inkscape:version="0.43" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:svg="http://www.w3.org/2000/svg" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" sodipodi:docbase="D:\Kuvat\Wikipedia" sodipodi:docname="Flag_of_Germany_(state).svg"
     xmlns="&ns_svg;" xmlns:xlink="&ns_xlink;" width="250" height="275" viewBox="0 0 250 275"
     overflow="visible" enable-background="new 0 0 250 275" xml:space="preserve">
<path id="Schild" fill="#FFCE00" stroke="#000000" d="M235.885,2.558c0,0,0,131.825,0,171.735
    c0,54.121-50.504,98.265-112.501,98.265c-61.996,0-112.5-44.144-112.5-98.265c0-39.91,0-171.735,0-171.735H235.885z"/>
</svg>

输出：

<?xml version="1.0" encoding="utf-8"?>
<!-- Generator: Adobe Illustrator 12.0.1, SVG Export Plug-In . SVG Version: 6.00 Build 51448)  -->
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" [
<!ENTITY ns_svg "http://www.w3.org/2000/svg"> <!-- Why this is still here???? -->
<!ENTITY ns_xlink "http://www.w3.org/1999/xlink"> <!-- Why this is still here???? -->
]>
<svg xmlns:cc="http://web.resource.org/cc/" xmlns:sodipodi="http://inkscape.sourceforge.net/DTD/sodipodi-0.dtd" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:svg="http://www.w3.org/2000/svg" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" xmlns="&ns_svg;" xmlns:xlink="&ns_xlink;" version="1.1" id="Bundesschild" sodipodi:version="0.32" inkscape:version="0.43" sodipodi:docbase="D:\Kuvat\Wikipedia" sodipodi:docname="Flag_of_Germany_(state).svg" width="250" height="275" viewBox="0 0 250 275" overflow="visible" enable-background="new 0 0 250 275" xml:space="preserve">
<path id="Schild" fill="#FFCE00" stroke="#000000" d="M235.885,2.558c0,0,0,131.825,0,171.735  c0,54.121-50.504,98.265-112.501,98.265c-61.996,0-112.5-44.144-112.5-98.265c0-39.91,0-171.735,0-171.735H235.885z"/>
</svg>

Answer 1

您只能删除整个文档类型节点。实体似乎不是它的子节点。但在此之前，您应该使用LIBXML_NOENT：

替换实体

$document = new DOMDocument();
$document->loadXML($xml, LIBXML_NOENT);

$document->removeChild($document->doctype);

echo $document->saveXML();

保留我找到的文档类型的唯一方法是创建一个包含文档类型的新文档，并将所有节点复制到其中。

$document = new DOMDocument();
$document->loadXML($xml, LIBXML_NOENT);

$existingDocumentType = $document->doctype;
if (NULL !== $existingDocumentType) {
  $implementation = new DOMImplementation;
  $newDocumentType = $implementation->createDocumentType(
    $existingDocumentType->name, 
    $existingDocumentType->publicId, 
    $existingDocumentType->systemId
  );
  $newDocument = $implementation->createDocument(null, null, $newDocumentType);
  foreach ($document->childNodes as $node) {
    $copy = $newDocument->importNode($node, TRUE);
    if ($copy) {
      $newDocument->appendChild($copy);
    }
  }
  $document = $newDocument;
}

echo $document->saveXML();

无法将文档类型节点导入到其他文档中，DOMDcoument::importNode()将为其返回FALSE。

如果您查看标准DOMDocumentType::entitites是DOMNamedNodeMap，并且应该有方法removeNamedItem()。但如果你称之为PHP输出：

Warning: DOMNamedNodeMap::removeNamedItem(): Not yet implemented in ... on line ...

如何在PHP中从XML中删除实体声明

一点背景：

1 个答案: