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