Automatically make a backup of the `config.php` file

Automatically make a backup of the config.php file: My config.php file recently got completely wiped somehow and now I have to start over. I don't know for sure what caused it but I installed a backup app shortly before it happened. Regardless of whether it was user error on my part or something external like an app, I think it would be a good idea that a file this important be automatically backed up, eg something like config.old.php. I'm not an expert but KeePassXC does this with its password database and I'm sure other programs do the same so I...