[英]PHP DOMDocument: Get inner HTML of node
When loading HTML into an <textarea>
, I intend to treat different kinds of links differently.将 HTML 加载到
<textarea>
,我打算以不同的方式对待不同类型的链接。 Consider the following links:考虑以下链接:
<a href="http://stackoverflow.com">http://stackoverflow.com</a>
<a href="http://stackoverflow.com">StackOverflow</a>
When the text inside a link matches its href
attribute, I want to remove the HTML, otherwise the HTML remains unchanged.当链接内的文本与其
href
属性匹配时,我想删除 HTML,否则 HTML 保持不变。
Here's my code:这是我的代码:
$body = "Some HTML with a <a href=\"http://stackoverflow.com\">http://stackoverflow.com</a>";
$dom = new DOMDocument;
$dom->loadHTML($body, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
foreach ($dom->getElementsByTagName('a') as $node) {
$link_text = $node->ownerDocument->saveHTML($node->childNodes[0]);
$link_href = $node->getAttribute("href");
$link_node = $dom->createTextNode($link_href);
$node->parentNode->replaceChild($link_node, $node);
}
$html = $dom->saveHTML();
The problem with the above code is that DOMDocument
encapsulates my HTML into a paragraph tag:上面代码的问题是
DOMDocument
把我的HTML封装成一个段落标签:
<p>Some HTML with a http://stackoverflow.com</p>
How do I get it ot only return the inner HTML of that paragraph?我如何让它只返回该段落的内部 HTML?
You need to have a root node to have a valid DOM document.您需要有一个根节点才能拥有有效的 DOM 文档。
I suggest you to add a root node <div>
to avoid to destroy a possibly existing one.我建议您添加一个根节点
<div>
以避免破坏可能存在的节点。
Finally, load the nodeValue
of the rootNode or substr()
.最后,加载 rootNode 或
substr()
的nodeValue
。
$body = "Some HTML with a <a href=\"http://stackoverflow.com\">http://stackoverflow.com</a>";
$body = '<div>'.$body.'</div>';
$dom = new DOMDocument;
$dom->loadHTML($body, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
foreach ($dom->getElementsByTagName('a') as $node) {
$link_text = $node->ownerDocument->saveHTML($node->childNodes[0]);
$link_href = $node->getAttribute("href");
$link_node = $dom->createTextNode($link_href);
$node->parentNode->replaceChild($link_node, $node);
}
// or probably better :
$html = $dom->saveHTML() ;
$html = substr($html,5,-7); // remove <div>
var_dump($html); // "Some HTML with a http://stackoverflow.com"
This works is the input string is :这是有效的输入字符串是:
<p>Some HTML with a <a href=\"http://stackoverflow.com\">http://stackoverflow.com</a></p>
outputs :输出:
<p>Some HTML with a http://stackoverflow.com</p>
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