Why is my page still caching after exclusion?

If you have added the URI to your plugin but the page still serves stale content, you are likely dealing with a secondary caching layer. Check if your hosting provider uses server-level caching like Varnish or Nginx FastCGI Cache. You will need to add exclusion rules at the server configuration level (e.g., in your vhost config or via your host's control panel) to fully exclude page from cache.

Why did excluding a page break my CSS layout?

This often happens when asset optimization plugins (like Autoptimize or WP Rocket's File Optimization) are still trying to minify inline scripts or styles on the excluded page, but the main stylesheet is heavily cached. You must ensure that both the HTML Page Cache AND the Minification/Aggregation cache are bypassed for that specific dynamic URL.

Does the DONOTCACHEPAGE constant work for object caching?

No. The DONOTCACHEPAGE constant strictly informs plugins to bypass HTML page caching. If your dynamic page relies on frequently updated database queries, you must utilize the wp_cache_delete() function or group exclusions in your persistent object cache (Redis/Memcached) configuration to ensure fresh data is retrieved from MySQL.

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