nginx multiple root config issue - nginx

Question

I have the following nginx config for multiple root (html/web is default, html/pma is additional route):
server {
listen 443 http2 ssl;
listen [::]:443 http2 ssl;
server_name website.com;
server_tokens off;
root /usr/share/nginx/html/web;
index index.php;
location / {
try_files $uri /index.php?$args;
}
location ^~ /pma {
root /usr/share/nginx/html;
location ~ \.php$ {
try_files $uri =404;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock;
fastcgi_index index.php;
include fastcgi_params;
}
}
location ~ \.php$ {
try_files $uri =404;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock;
fastcgi_index index.php;
include fastcgi_params;
}
}
So, by default /html/web/index.php is opened, however website.com/pma opens /html/pma/, where pma is PHPMyAdmin.
The problem is:
PHPMyAdmin authentification form redirects to index.php. Therefore, when I write my credentials, it redirects me to /html/web/index.php! But should /html/pma/index.php. Even log out from PHPMyAdmin redirects to /html/web/index.php!
Could anyone suggest a better way of configuration?

Answer 1

I can see two errors in your configuration.
You try_files statement should end with /index.php or =404, not both! See this document for details.
The nested location ~ \.php$ block will never be consulted. The outer location ~ \.php$ block take precedence. You can solve this problem by using the ^~ modifier on the surrounding prefix location. See this document for details. For example:
location ^~ /pma {
...
location ~ \.php$ {
...
}
}
location ~ \.php$ {
...
}