How to find PHP filename and ID of the URL?

.htaccess is now a very common URL rewrite to make it SEO friendly and cover the database IDs.

What are the ways to explore php file on the server given to URL via .htaccess?

Example : The URL is www.domain.com/news/56.

I expect to find news.php?id=56 i.e. www.domain.com/news.php?id=56