使用DOMDocument删除HTML标签 [英] Remove HTML Tag using DOMDocument
问题描述
我想从我的html中删除< font> 标记，并尝试使用 replaceChild 这样做，但是它似乎无法正常工作.任何人都可以抓住可能出问题的地方吗?
I'd like to remove <font> tags from my html and am trying to use replaceChild to do so, but it doesn't seem to work properly. Can anyone catch what might be wrong?
$html = '<html><body><br><font class="heading2">Limited Size and Resources</font><p><br><strong>Q: When can a member use the limited size and resources exception?</strong></p></body></html>';
$dom = new DOMDocument();
$dom->loadHTML($html);
$font_tags = $dom->GetElementsByTagName('font');
foreach($font_tags as $font_tag) {
foreach($font_tag as $child) {
$child->replaceChild($child->nodeValue, $font_tag);
}
}
echo $dom->saveHTML();
据我了解， $ font_tags 是一个 DOMNodeList ，因此我需要对其进行两次迭代才能使用 DOMNode :: replaceChild 功能.然后，我只想用标签内的内容替换当前值.但是，当我输出$ html时，没有任何变化.有什么想法可能是错的吗?
From what I understand, $font_tags is a DOMNodeList, so I need to iterate through it twice in order to use the DOMNode::replaceChild function. I then want to replace the current value with just the content inside of the tags. However, when I output the $html nothing changes. Any ideas what could be wrong?
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$html = '<html><body><br><font class="heading2">Limited Size and Resources</font><p><br><strong>Q: When can a member use the limited size and resources exception?</strong></p></body></html>';
$dom = new DOMDocument();
$dom->loadHTML($html);
$font_tags = $dom->GetElementsByTagName('font');
/* You only need one loop, as it is iterating your collection
You would only need a second loop if each font tag had children of their own
*/
foreach($font_tags as $font_tag) {
/* replaceChild replaces children of the node being called
So, to replace the font tag, call the function on its parent
$prent will be that reference
*/
$prent = $font_tag->parentNode;
/* You can't insert arbitrary text, you have to create a textNode
That textNode must also be a member of your document
*/
$prent->replaceChild($dom->createTextNode($font_tag->nodeValue), $font_tag);
}
echo $dom->saveHTML();
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