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Last active October 19, 2021 14:25
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The WordPress HTTP header must have cache-control set to must-revalidate for Signed Exchanges (SXG) to work with Cloudflare on Google Search. This code must be added to the theme's functions.php file. Additionally, the Browser Cache TTL on Cloudflare must be set to Respect Existing Headers.
Raw
functions.php
/**
* Add cache-control headers to response
*/
function add_cache_control_headers() {
if (!is_admin()) {
header("Cache-Control: public, must-revalidate, max-age=3600");
}
}
add_action( 'template_redirect', 'add_cache_control_headers' );
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henshaw commented Oct 19, 2021

This code was originally found from this article: https://barebones.dev/articles/cloudflare-enable-full-page-caching-with-wordpress/

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