[英]php DOMDocument adds <html> headers with DOCTYPE declaration
I'm adding a #b hash to each link via the DOMDocument class.我正在通过 DOMDocument class 向每个链接添加 #b hash。
$dom = new DOMDocument();
$dom->loadHTML($output);
$a_tags = $dom->getElementsByTagName('a');
foreach($a_tags as $a)
{
$value = $a->getAttribute('href');
$a->setAttribute('href', $value . '#b');
}
return $dom->saveHTML();
That works fine, however the returned output includes a DOCTYPE
declaration and a <head>
and <body>
tag.这工作正常,但是返回的 output 包含一个DOCTYPE
声明和一个<head>
和<body>
标记。 Any idea why that happens or how I can prevent that?知道为什么会发生这种情况或我如何防止这种情况发生吗?
That's what DOMDocument::saveHTML()
generally does, yes : generate a full HTML Document, with the Doctype declaration, the <head>
tag, ... 这就是DOMDocument::saveHTML()
通常所做的,是的:生成一个完整的HTML文档,带有Doctype声明, <head>
标签,......
Two possible solutions : 两种可能的解决方
saveHTML()
accepts one additional parameter that might help you 如果您使用PHP> = 5.3, saveHTML()
接受一个可能对您有帮助的附加参数
str_replace()
or regex or whatever equivalent you can think of to remove the portions of HTML code you don't need. 如果您需要使用PHP <5.3.6的代码,则必须使用一些str_replace()
或正则表达式或任何您能想到的等效项来删除不需要的HTML代码部分。
Adding $doc->saveHTML(false);
添加$doc->saveHTML(false);
will not work and it will return a error because it expects a node and not bool. 将无法工作,它将返回一个错误,因为它需要一个节点,而不是bool。
The solution I used: 我使用的解决方案:
return preg_replace('/^<!DOCTYPE.+?>/', '', str_replace( array('<html>', '</html>', '<body>', '</body>'), array('', '', '', ''), $doc->saveHTML()));
I`m using PHP >5.4 我使用PHP> 5.4
I solved this problem by creating new DOMDocument and copying child nodes from original to new one. 我通过创建新的DOMDocument并将子节点从原始节点复制到新节点来解决了这个问题。
function removeDocType($oldDom) {
$node = $oldDom->documentElement->firstChild
$dom = new DOMDocument();
foreach ($node->childNodes as $child) {
$dom->appendChild($doc->importNode($child, true));
}
return $dom->saveHTML();
}
So insted of using 所以绝对使用
return $dom->saveHTML();
I use: 我用:
return removeDocType($dom);
I was in the case where I want the html wrapper but not the DOCTYPE, the solution was in line with Tiago A.:在我想要 html 包装器而不是 DOCTYPE 的情况下,解决方案与 Tiago A 一致:
// Avoid adding the DOCTYPE header
$dom->loadHTML($bodyContent, LIBXML_HTML_NODEFDTD);
// Avoid adding the DOCTYPE header AND html/body wrapper
$dom->loadHTML($bodyContent, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
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