PHP include .html files - validation errors

[matronator]

The validator throws errors in .html file snippets that are to be included in another file with PHP's include("header.html"). Example of what I mean:

I don't normally work with PHP, so this is not that big of a deal, I just disabled the extension for this one project, BUT...

It would be nice if the extension could somehow recognize that a certain .html file is just a snippet and to not validate it. Maybe if the file is missing doctype, html, head and body tags, it would not validate it, or something like that.

[DustinLuck]

I have a similar use case for Google Apps Scripts (GAS) projects where I've created fragment files and due to GAS only handling js/html files, all of my CSS & JavaScript files have this same issue. I was thinking a good solution might be to allow for a comment like <!--fragment--> to be added at the top of a file to note that it's a fragment.