Why is request URI wrong in PHP-FPM access logs?

Question

PHP

The nginx configuration includes the following settings.

site.conf:

server {
    ...
    location / {
        try_files $uri /index.php$is_args$args;
    }

    location ~ ^/index\.php(/|$) {
        fastcgi_pass unix:/run/php/php8.0-fpm.sock;
        fastcgi_split_path_info ^(.+\.php)(/.*)$;

        include fastcgi.conf;
        internal;
    }
    ...
}

fastcgi.conf:

fastcgi_param  QUERY_STRING       $query_string;
fastcgi_param  REQUEST_METHOD     $request_method;
fastcgi_param  CONTENT_TYPE       $content_type;
fastcgi_param  CONTENT_LENGTH     $content_length;

fastcgi_param  SCRIPT_FILENAME    $realpath_root$fastcgi_script_name;
fastcgi_param  SCRIPT_NAME        $fastcgi_script_name;
fastcgi_param  PATH_INFO          $fastcgi_path_info;
fastcgi_param  PATH_TRANSLATED    $realpath_root$fastcgi_path_info;
fastcgi_param  REQUEST_URI        $request_uri;
fastcgi_param  DOCUMENT_URI       $document_uri;
fastcgi_param  DOCUMENT_ROOT      $realpath_root;
fastcgi_param  SERVER_PROTOCOL    $server_protocol;
fastcgi_param  REQUEST_SCHEME     $scheme;
fastcgi_param  HTTPS              $https if_not_empty;

fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
fastcgi_param  SERVER_SOFTWARE    nginx/$nginx_version;

fastcgi_param  REMOTE_ADDR        $remote_addr;
fastcgi_param  REMOTE_PORT        $remote_port;
fastcgi_param  REMOTE_USER        $remote_user;
fastcgi_param  SERVER_ADDR        $server_addr;
fastcgi_param  SERVER_PORT        $server_port;
fastcgi_param  SERVER_NAME        $server_name;

# PHP only, required if PHP was built with --enable-force-cgi-redirect
fastcgi_param  REDIRECT_STATUS    200;

# Mitigate https://httpoxy.org/ vulnerabilities
fastcgi_param  HTTP_PROXY         "";

According to the PHP-FPM documentation, using "%r" in the access.format directive of the pool's configuration should output "the request URI (without the query string)" to the access log. But in fact, "/index.php" (that is, SCRIPT_NAME) is displayed there.

If instead of "%r" you use "%{REQUEST_URI}e" - what you need is written to the logs.

Question: what am I doing wrong?
Digging into the PHP-FPM sources did not help, it seems that everything should be fine.

Answer 1

That's right $uri is /index.php, that is, without the query string, $request_uri is /index.php?foo=1&bar=2that is, with the query string
%r %q you are apparently looking for.