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WP Rewrite Rules, Custom Templates, and Full Site Editing Themes Compatibility

I'm developing a WordPress plugin that adds a custom rewrite rule using add_rewrite_rule() and loads a custom template for that rule using the template_include hook. The template includes get_header() at the top and get_footer() at the bottom, which work as expected with traditional themes.

The Problem

When using Full Site Editing (FSE) themes like "Twenty Twenty-Three", I encounter the following deprecation errors:

Deprecated: File Theme without header.php is deprecated since version 3.0.0 with no alternative available. Please include a header.php template in your theme. in /path/to/wp_installation/wp-includes/functions.php on line 5583

Deprecated: File Theme without footer.php is deprecated since version 3.0.0 with no alternative available. Please include a footer.php template in your theme. in /path/to/wp_installation/wp-includes/functions.php on line 5583

Questions

1. How can I load the header and footer blocks in FSE themes?
2. Is there a way to check if the active theme is an FSE theme?

Updates

Update 1

Creating a custom page template with get_header() and get_footer() functions still raises the same errors.

Update 2

This issue appears to be related to this ticket on WordPress core trac.

Any insights or solutions would be greatly appreciated!

本文标签： plugin developmentCustom WP Rewrite Rules and Templates Incompatible with Full Site Editing Themes