Wordpress is in sub-directory nested, and blog address is
domain.tld/nested
useful links
https://serversforhackers.com/c/nginx-php-in-subdirectory
https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
server {
listen 80 default_server;
listen [::]:80 default_server;
root /var/www/top/public;
index index.html index.htm index.php;
server_name _;
location / {
try_files $uri $uri/ /index.php$is_args$args;
}
location /nested {
alias /var/www/nested/public;
try_files $uri $uri/ @nested;
location ~ \.php$ {
index index.php;
include snippets/fastcgi-php.conf;
fastcgi_param SCRIPT_FILENAME $request_filename;
fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
}
}
location @nested {
rewrite /nested/(.*)$ /nested/index.php?/$1 last;
}
location ~ \.php$ {
include snippets/fastcgi-php.conf;
fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
}
}
Short explanations.
1) root of blog is not domain as domain.tld, but it is address location as domain.tld/nested. So there should be rewrite rule:
rewrite /nested/(.*)$ /nested/index.php?/$1 last;
2) We use alias, because of explanation from one of useful links below.
Note that distinction - with that
alias, Nginx does NOT look for files within /var/www/
nested/public/
nested/foo, like it would with the
root directive.
3) We use $request_filename instead of $document_root$fastcgi_script_name because of next explanation.
If you use the alias directive with $document_root$fastcgi_script_name, $document_root$fastcgi_script_name will return the wrong path.
Request /api/testing.php:
$document_root$fastcgi_script_name == /app/www//api/testing.php$request_filename == /app/www/testing.php
Request /api/:
$document_root$fastcgi_script_name == /app/www//api/index.php$request_filename == /app/www/index.php
4) And if you use $request_filename, you should set index using index directive, fastcgi_index will not work.
It means index index.php; in location
