Cache Url with QueryString
By default, WP Fastest Cache does not cache URLs with query string parameters because they can produce dynamic or user-specific content.
For security and cache correctness, every parameter in the URL must be included in the allowlist.
Enable Cache for URLs with Query Strings
If you want to allow specific query string parameters to be cached, you need to add the following line after <?php which exists at the top of wp-config.php file.
define('WPFC_CACHE_QUERYSTRING_PARAMS', 'lang, currency');
Google Analytics Parameters
Google Analytics allows adding campaign parameters to the destination URLs to collect information about the overall efficacy of the campaigns.
If a url contains any google analytics parameters such as utm_source, utm_medium, utm_campaign, utm_term, utm_content, the url is served via main page cache. You don’t need to do any extra action.
Example
https://www.example.com/mypost/?utm_source=summer-mailer&utm_medium=email&utm_campaign=summer-sale
This url is served via the cache of https://www.example.com/mypost/
How To Disable
If you want to disable this feature, you can exclude via “exclude” tab as below.
Yandex Metrica Parameters
If a url contains a query string, the url is not served via cache but the situation is different for the urls which contains Yandex Metrica parameters.
Yandex adds a special parameter – ysclid – to the link when visiting a site from the search results. If a url contains a query string, the url is not served via cache but thanks to this feature, pages are served via the cache for users from Yandex.
If a url contains any Yandex Click Id parameters such as yclid, yadclid or ysclid, the url is served via main page cache. You don’t need to do any extra action.
Example
https://www.example.com/mypost/?ysclid=ksil7dwgjm
This url is served via the cache of https://www.example.com/mypost/
How To Disable
If you want to disable this feature, you can exclude via “exclude” tab as below.
Facebook Click ID Parameters
Facebook Click ID parameters can be added to destination URLs to track visits coming from Facebook and Instagram.
If a URL contains the fbclid parameter, it is served via the main page cache. You don’t need to take any extra action.
Example
https://www.example.com/mypost/?fbclid=summer-mailer
This url is served via the cache of https://www.example.com/mypost/
How to Disable
If you want to disable this feature, you can exclude via “exclude” tab as below.