Description:
------------
php.ini set to:
open_basedir = .

Nginx config:
    location / {
        root           /opt/www/test;
        fastcgi_pass   unix:/run/php/php7.2-fpm.sock;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  /opt/www/test/index.php;
        include        fastcgi_params;
    }

From documentation:
The special value . indicates that the working directory of the script will be used as the base-directory.

Trying to GET the PHP-file results in:
2019/01/16 19:06:39 [error] 3013#3013: *9 FastCGI sent in stderr: "PHP message: PHP Warning:  Unknown: open_basedir restriction in effect. File(/opt/www/test/index.php) is not within the allowed path(s): (.) in Unknown on line 0



Expected result:
----------------
I expect the file to be executed and result sent to client. According to documentation, setting open_basedir to "." should limit the current script to the current directory, but it does not even seem to allow the ACTUAL script to run at all.

If I turn off open_basedir and just print the getcwd(), I can clearly see that current dir is /opt/www/test and as the "." setting should allow access to "current dir", it should allow the execution of /opt/www/test/index.php, but it does not.

Actual result:
--------------
2019/01/16 19:06:39 [error] 3013#3013: *9 FastCGI sent in stderr: "PHP message: PHP Warning:  Unknown: open_basedir restriction in effect. File(/opt/www/test/index.php) is not within the allowed path(s): (.) in Unknown on line 0