如何使用正则表达式删除特定的标签(How to delete a specific tag using regex)

如何使用正则表达式删除特定的标签(How to delete a specific tag using regex)

我试图删除ul标签和嵌套标签里面的ul。

<ul class="related"> <li><a href="/related-1.html" target="_blank">Related article</a></li> <li><a href="/related-2.html" target="_blank">Related article 2</a></li> </ul>

我刚刚使用这个删除了ul内部的嵌套li（我为这个东西使用了php，所以我把内容从db作为$内容）

$content = $rq['content']; //here is the <ul class="related">... code $content1 = preg_replace('~<ul[^>]*>\K(?:(?!<ul).)*(?=</ul>)~Uis', '', $content); //it works here

到目前为止，我获得了$content1的下一个字符串

<ul class="related"></ul>

那么如何使用正则表达式来删除这段剩余的代码呢？ 我尝试了类似的模式，但没有得到我想要的结果。

$finalcontent = preg_replace('~<ul[^>]*>\K.*(?=</ul>)~Uis', '', $content1);

I'm trying to delete a ul tag and nested tags inside that ul.

<ul class="related"> <li><a href="/related-1.html" target="_blank">Related article</a></li> <li><a href="/related-2.html" target="_blank">Related article 2</a></li> </ul>

I just deleted the nested li inside the ul using this (I'm using php for this thing, so I pulled content from a db as $content)

$content = $rq['content']; //here is the <ul class="related">... code $content1 = preg_replace('~<ul[^>]*>\K(?:(?!<ul).)*(?=</ul>)~Uis', '', $content); //it works here

So far I get the next string in $content1

<ul class="related"></ul>

So how do I delete this piece of remaining code using regex? I tried the similar pattern but did not get the results I am wanting.

$finalcontent = preg_replace('~<ul[^>]*>\K.*(?=</ul>)~Uis', '', $content1);

最满意答案

以下内容可能适合您的目的：

$content1 = '<p>Foo</p><ul class="related"></ul><p>Bar</p>'; $finalcontent = preg_replace('~<ul[^>]*>.*</ul>~Uis', '', $content1); echo $finalcontent;

preg_replace调用应该从$content1删除所有<ul...>...</ul> 。 对于给定的示例内容，它返回：

<p>Foo</p><p>Bar</p>

如果您希望替换更具体，例如，为了仅删除<ul class="related">...</ul>但不删除其他类型的<ul>...</ul> ，你可以使正则表达式更具体。 例如：

$content1 = '<p>Foo</p><ul class="related"></ul><p>Bar</p><ul><li>Do not delete this one</li></ul>'; $finalcontent = preg_replace('~<ul class="related">.*</ul>~Uis', '', $content1); echo $finalcontent;

对于给定的例子，这将返回：

<p>Foo</p><p>Bar</p><ul><li>Do not delete this one</li></ul>

The following may suit your purpose:

$content1 = '<p>Foo</p><ul class="related"></ul><p>Bar</p>'; $finalcontent = preg_replace('~<ul[^>]*>.*</ul>~Uis', '', $content1); echo $finalcontent;

The preg_replace call should remove all occurrences of <ul...>...</ul> from $content1. For the given example content, it returns:

<p>Foo</p><p>Bar</p>

If you want the replacement to be more specific, e.g., in order to only remove occurrences of <ul class="related">...</ul> but not other types of <ul>...</ul>, you can make the regex more specific. For example:

$content1 = '<p>Foo</p><ul class="related"></ul><p>Bar</p><ul><li>Do not delete this one</li></ul>'; $finalcontent = preg_replace('~<ul class="related">.*</ul>~Uis', '', $content1); echo $finalcontent;

For the given example, this would return:

<p>Foo</p><p>Bar</p><ul><li>Do not delete this one</li></ul>