Preg_match移动段落上面的选择 - preg_match move selection above paragraph

preg_match move selection above paragraph

本文关键字：选择段落 match 移动 Preg | 更新日期: 2023-09-27

我想使用preg_replace将图像移动到大型文本中的容器段落上方。

所以，我可能有

$body = '<p><img src="a" alt="image"></p><img src="b" alt="image"><p>something here<img src="c" alt="image"> text</p>'

我想要什么(除了40英尺的游艇等等);

<img src="a" alt="image"><p></p><img src="b" alt="image"><img src="c" alt="image"><p>something here text</p>

我有这个，它不工作，

$body = preg_replace('/(<p>.*'s*)(<img.*'s*?image">)(.*'s*?<'/p>)/', '$2$1$3',$body);

结果是;

<img src="c" alt="image"><p><img src="a" alt="image"></p><img src="b" alt="image"><p>something here text</p>

您应该使用DOMDocument加载HTML并使用其操作来移动节点:

$content = <<<EOM
<p><img src="a" alt="image"></p>
<img src="b" alt="image"><p>something here<img src="c" alt="image"> text</p>
EOM;
$doc = new DOMDocument;
$doc->loadHTML($content);
$xp = new DOMXPath($doc);
// find images that are a direct descendant of a paragraph
foreach ($xp->query('//p/img') as $img) {
        $parent = $img->parentNode;
        // move image as a previous sibling of its parent
        $parent->parentNode->insertBefore($img, $parent);
}
echo $doc->saveHTML();