301 redirect from .php post to without .php URL

Hi guys,
we need some help, and really hope we will find it.
on our 2 websites, we actually have a WP permalink config set like this : /%postname%.php
we have to move from our current dedicated server with Apache before the Nginx, we have found a VM solution based on an Nginx only.
But, this Ngnix does not allow to use a “.php” as a tld of posts. Our migration tests showed us that we were going to get all our (10.000+) posts in 404 error, and also destroy our SEO efforts by the way. Pages and categories are not concerned, only posts.

we use the redirection plugin since a long time. But we did not find the 301 config to simply redirect a .php for any post to it’s same permalink content withtout .php at the end.

Is there any magician here who knows the formula ? we really hope so.
Thank you for reading.
Bye !
fred

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