Prepares the theme support value for inclusion in the REST API response.

Check for potential issues with plugin and theme auto-updates.

Test if ‘file_uploads’ directive in PHP.ini is turned off.

Test if there’s an active PHP session that can affect loopback requests.

Test if plugin and theme auto-updates appear to be configured correctly.

Class WP_Sitemaps.

WP_Sitemaps constructor.

Adds the sitemap index to robots.txt.

Initiates all sitemap functionality.

Redirects a URL to the wp-sitemap.xml