Question

I am trying to put into a string the HTML after a h1 tag up until the next h1 tag, and then continue.

For example, here is the HTML:

<h1>Heading</h1>
<p>Paragraph</p>
<ul>
  <li>List item</li>
  <li>List item</li>
</ul>
<p>Paragraph</p>
<h1>Heading 2</h1>
<ul>
  <li>List item</li>
  <li>List item</li>
</ul>
<p>Paragraph<img /></p>

And from this I am trying to create this array:

array(
  0 => '<p>Paragraph</p><ul><li>List item</li><li>List item</li></ul><p>Paragraph</p>',
  1 => '<ul><li>List item</li><li>List item</li></ul><p>Paragraph<img /></p>'
)

What would be the XPath query to select all content after the h1 tag up until the next, and so on?

Any help or advice is appreciated.

UPDATE:

What I am ultimately trying to achieve is, using PHP, create this format of an array:

array(
  'headings' => array(
      1 => '<h1>Heading</h1>',
      2 => '<h1>Heading 2</h1>'
  ),
  'content'  => array(
      1 => '<p>Paragraph</p><ul><li>List item</li><li>List item</li></ul><p>Paragraph</p>',
      2 => '<ul><li>List item</li><li>List item</li></ul><p>Paragraph<img /></p>'
  )
)

Answer 1

I did it like this 🙂

$html = '<h1>Heading</h1><p>Paragraph</p><ul><li>List item</li><li>List item</li></ul><p>Paragraph</p><h1>Heading 2</h1><ul><li>List item</li><li>List item</li></ul><p>Paragraph<img /></p>';

$dom_document = new DOMDocument();

$dom_document->loadHTML($html);
$dom_document->preserveWhiteSpace = false;

//use DOMXpath to navigate the html with the DOM
$dom_xpath = new DOMXpath($dom_document);

$elements = $dom_xpath->query("/html/body/*");

if (!is_null($elements)) {
    $i = 0;
    foreach ($elements as $element) {
        if ($element->nodeName == 'h1') {
            $i++;
            $array['headings'][$i] = $dom_document->saveHtml($element);
            continue;
        } else {
            $array['content'][$i] .= $dom_document->saveHtml($element);
        }
    }
}

var_dump($array);

NOTE: should you be using PHP 5.2 then replace:

$array['headings'][$i] = $dom_document->saveHtml($element);

and

$array['content'][$i] .= $dom_document->saveHtml($element);

with:

$array['headings'][$i] = $dom_document->saveXml($element);
$array['content'][$i] .= $dom_document->saveXml($element);