Level 3
that probably means that the nginx sites-available file for your site is using the php7.0-fpm. It is possible for you to have multiple different versions of php on the server, the nginx config file for the site controls what nginx uses.
you should have something like this when finished..
location / {
try_files $uri $uri/ /index.php?$query_string;
}
location ~ \.php$ {
include snippets/fastcgi-php.conf;
fastcgi_pass unix:/run/php/php7.2-fpm.sock;
}
