无法使用此大 URL 生成 XML 文件 [英] Unable to generate XML file with this big URL

问题描述

我想使用以下代码生成 XML，但由于我包含大 URL，因此出现错误.甚至 cdata 也不起作用:

I want to generate XML with this following code but it's giving error as I include big URL. Even cdata is not working:

$xml = new SimpleXMLElement('<xml/>');

for ($i = 1; $i <= 8; ++$i) {
    $track = $xml->addChild('track');
    $track->addChild('path', "data[");
    $track->addChild('title', "<![CDATA[http://r8---sn-5hn7sn7k.googlevideo.com/videoplayback?mt=1417417897&mv=m&ms=au&ip=2001:1af8:4700:a022:1::4ae9&itag=18&initcwndbps=4948750&mm=31&sver=3&id=o-AB1_DFOem6qVMtWki7uWj0CcIevyqEaY_OtwcbRPKZXT&ipbits=0&upn=IFgTkloUxQQ&expire=1417439567&fexp=902522,907259,922247,927622,932404,935694,941004,942810,943909,947209,948124,952302,952605,952901,953912,957103,957105,957201&key=yt5&sparams=dur,id,initcwndbps,ip,ipbits,itag,mm,ms,mv,source,upn,expire&source=youtube&signature=7266EE8B52AAB9E3C6DECBADDD112BDF00E85EFB.362737C47ECAE4D9E25E900E8C24483799B2A8F8&dur=1554.831&title=8+Stunning+Linguistic+Miracles+of+The+Holy+Quran+%7C+Kinetic+Typography]]>");
}

Header('Content-type: text/xml');
print($xml->asXML());

推荐答案

您不能使用 SimpleXML 添加 CDATA 部分，只能添加标准文本节点.但即使这样也有一个错误.文本不能包含实体(&...;).DOMDocument::createElement 和 DOMNode::$nodeValue 中存在相同的错误.但是，您可以使用 DOM 创建文档.

You can not add CDATA sections with SimpleXML, only standard text nodes. But even that has a bug. The text can not contain entities (the &...;). The same bug exists in DOMDocument::createElement and DOMNode::$nodeValue. You can create the document with DOM however.

$dom = new DOMDocument();
$root = $dom->appendChild($dom->createElement('xml'));

for ($i = 1; $i <= 8; ++$i) {
    $track = $root->appendChild($dom->createElement('track'));
    $track
      ->appendChild($dom->createElement('path'))
      ->appendChild($dom->createTextNode('data['));
    $track
      ->appendChild($dom->createElement('title'))
      ->appendChild($dom->createCDATASection("http://r8---sn-5hn7sn7k.googlevideo.com/videoplayback?mt=1417417897&mv=m&ms=au&ip=2001:1af8:4700:a022:1::4ae9&itag=18&initcwndbps=4948750&mm=31&sver=3&id=o-AB1_DFOem6qVMtWki7uWj0CcIevyqEaY_OtwcbRPKZXT&ipbits=0&upn=IFgTkloUxQQ&expire=1417439567&fexp=902522,907259,922247,927622,932404,935694,941004,942810,943909,947209,948124,952302,952605,952901,953912,957103,957105,957201&key=yt5&sparams=dur,id,initcwndbps,ip,ipbits,itag,mm,ms,mv,source,upn,expire&source=youtube&signature=7266EE8B52AAB9E3C6DECBADDD112BDF00E85EFB.362737C47ECAE4D9E25E900E8C24483799B2A8F8&dur=1554.831&title=8+Stunning+Linguistic+Miracles+of+The+Holy+Quran+%7C+Kinetic+Typography"));
}

$dom->formatOutput = TRUE;
print($dom->saveXML());

你可以看到 DOM 文档有很多方法来创建不同的节点类型.节点有一些方法可以将新节点附加到它们上面.

You can see that DOM document has a bunch of methods to create the different node types. The nodes have some methods to append the new node to them.

这些方法返回节点，以便您可以嵌套它们.

The methods return the nodes so you can nest them.

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