Calling a raw php file that is not a method nor controller?

Yes that is one solution to move my file outside of my codeigniters root folder but i beleive there is actually a proper way to state a file that is a method nor a controller.ty for your insight on this too.

By default, everything is fed to index.php (the front controller). I think the only way to bypass this behavior is by editing the .htacess file in the public folder. But I’m no expert in apache config...