How to check which php version is using my website?

Your Dashboard -> Tools – > Site Health

Hi, @eddiegoulding0321. As @t-p mentioned, the Site Health area can help you with this.

You can learn more about this and about which PHP versions are on the market in this article and its embedded video https://wpbuffs.com/wordpress-php-version-check/ (https://youtu.be/hCltKB859zA).

Also, please make sure to backup your site and database files before you update your PHP version. There can be code conflicts, so it’s nice to have a backup on hand if you need to downgrade your PHP version.

Hope that helps!