How to Save HTML from a DOMDocument Without Losing Block-Level Elements?

How to Save HTML of DOMDocument Without Omitting Block-Level Elements

The issue arises when attempting to save the contents of a DOMDocument as HTML without including the default HTML, body, and p tag wrappers. The suggested solution of using saveXML($d->getElementsByTagName('p')->item(0)) only functions when the content lacks block-level elements.

The Problem with the Original Approach

In cases where block-level elements are present, such as h1 tags, the output from saveXML is truncated, leaving only the text within the p tag.

The Updated Approach

To resolve this issue, you can utilize an updated version of the loadHTML function introduced in PHP 5.4 and Libxml 2.6. This function includes an $options parameter that allows you to specify how the content should be parsed. By setting the following options:

$html->loadHTML($content, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);

Explaining the Options

• LIBXML_HTML_NOIMPLIED disables the automatic addition of implied html/body elements.
• LIBXML_HTML_NODEFDTD prevents a default doctype from being added when one is not found.

When you subsequently perform saveHTML(), the output will not contain a doctype, html tag, or body tag. This approach ensures that block-level elements are retained in the output.

Note:

• The Libxml 2.6 documentation states that Libxml 2.6 is required, but LIBXML_HTML_NODEFDTD is only available in Libxml 2.7.8.
• LIBXML_HTML_NOIMPLIED is available in Libxml 2.7.7.

The above is the detailed content of How to Save HTML from a DOMDocument Without Losing Block-Level Elements?. For more information, please follow other related articles on the PHP Chinese website!