Internal redirect is not happening, download php file

Hi there,

I'm pretty sure I missed an obvious thing but it's driving me crazy, I need other eyeballs..

I got an application with plugins were sources are organized like:

/app/plugins/foo/www/... that corresponds to my URL http://example.com/plugins/foo/...

I got the following snippet as nginx configuration:

location /plugins/foo {
alias /app/plugins/foo/www;
try_files $uri /index.php =404;
}

location ~* ^/plugins/foo/(.*\.php)$ {
alias /app/plugins/foo/www/$1;

fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}

It works well for URLs like:
* http://example.com/plugins/foo/style/style.css
* http://example.com/plugins/foo/index.php
* http://example.com/plugins/foo/bar.php

But as soon as I'm trying to reach (front controller pattern):
* http://example.com/plugins/foo/?id=5
* http://example.com/plugins/foo/another/path

I got to download the php file.

According to the logs, the try_files seems to do what is expected but instead of internal redirect to php handler, it server the file as static:

2017/01/24 13:29:36 [debug] 20803#0: *6 using configuration "/plugins/foo"
2017/01/24 13:29:36 [debug] 20803#0: *6 http cl:-1 max:1048576
2017/01/24 13:29:36 [debug] 20803#0: *6 rewrite phase: 3
2017/01/24 13:29:36 [debug] 20803#0: *6 post rewrite phase: 4
2017/01/24 13:29:36 [debug] 20803#0: *6 generic phase: 5
2017/01/24 13:29:36 [debug] 20803#0: *6 generic phase: 6
2017/01/24 13:29:36 [debug] 20803#0: *6 generic phase: 7
2017/01/24 13:29:36 [debug] 20803#0: *6 generic phase: 8
2017/01/24 13:29:36 [debug] 20803#0: *6 access phase: 9
2017/01/24 13:29:36 [debug] 20803#0: *6 access phase: 10
2017/01/24 13:29:36 [debug] 20803#0: *6 post access phase: 11
2017/01/24 13:29:36 [debug] 20803#0: *6 try files phase: 12
2017/01/24 13:29:36 [debug] 20803#0: *6 http script var: "/plugins/git/"
2017/01/24 13:29:36 [debug] 20803#0: *6 trying to use file: "/" "/app/plugins/foo/www/"
2017/01/24 13:29:36 [debug] 20803#0: *6 trying to use file: "/index.php" "/app/plugins/foo/www/index.php"
2017/01/24 13:29:36 [debug] 20803#0: *6 try file uri: "/plugins/foo/index.php"
2017/01/24 13:29:36 [debug] 20803#0: *6 content phase: 13
2017/01/24 13:29:36 [debug] 20803#0: *6 content phase: 14
2017/01/24 13:29:36 [debug] 20803#0: *6 content phase: 15
2017/01/24 13:29:36 [debug] 20803#0: *6 content phase: 16
2017/01/24 13:29:36 [debug] 20803#0: *6 content phase: 17
2017/01/24 13:29:36 [debug] 20803#0: *6 content phase: 18
2017/01/24 13:29:36 [debug] 20803#0: *6 http filename: "/app/plugins/foo/www/index.php"
2017/01/24 13:29:36 [debug] 20803#0: *6 add cleanup: 000000000153FF70
2017/01/24 13:29:36 [debug] 20803#0: *6 http static fd: 13
2017/01/24 13:29:36 [debug] 20803#0: *6 http set discard body
2017/01/24 13:29:36 [debug] 20803#0: *6 xslt filter header
2017/01/24 13:29:36 [debug] 20803#0: *6 HTTP/1.1 200 OK


What did I miss ?