PHP删除元素前后的文本

Question

I have some database rows with a lot of text but I only want to select a specific text.

Example:

<strong>Lorem</strong>
<ul>
    <li>Lorem</li>
    <li>Ipsum</li>
</ul>

<strong>Ipsum</strong>
<ul>
    <li>Ipsum</li>
    <li>Lorem</li>
</ul>

<strong>Third</strong>
<ul>
    <li>Some words</li>
    <li>More words</li>
</ul>

I only want to select the Ipsum part with the ul element and ignore the rest. I was trying to work with DOMXPath->evaluate('//text()[contains()]') but this only shows the Ipsum text and not the elements.

EDIT: The exact output I want is:

<strong>Ipsum</strong>
<ul>
    <li>Ipsum</li>
    <li>Lorem</li>
</ul>

The code I tried (I have tried more but this is the last result):

$d = new DOMDocument;
$d->loadHTML($text);

$x = new DOMXPath($d);
$result = $x->evaluate("//text()[contains(., 'Ipsum')]");

$result->item(0)->nodeValue;

This shows only the Ipsum text and not the list elements.

Answer 1

As your trying to get 2 nodes, the way I've done it is to use 2 XPath expressions...

$d = new DOMDocument;
$d->loadHTML($text);

$x = new DOMXPath($d);
$result = $x->evaluate("//strong[contains(., 'Ipsum')]");
$result1 = $x->evaluate("//strong[contains(., 'Ipsum')]/following-sibling::ul");

echo $d->saveHTML($result->item(0)).PHP_EOL;
echo $d->saveHTML($result1->item(0)).PHP_EOL;

Which outputs.

<strong>Ipsum</strong>
<ul>
<li>Ipsum</li>
    <li>Lorem</li>
</ul>