Why nginx doesn't know PHP on os X and starts downloading it?

Question

I have installed nginx, php-fpm and php56 on OS X EL CAPITAN. I used ps command to check whether nginx and fpm is running or not.

I have added the below code block to server block in nginX:

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

nginX listen on 8080 and fpm on 9000. I used lsof command to check that:

php-fpm 22903 root 0u IPv4 0x5a9bc9209264e227 0t0 TCP 127.0.0.1:9000 (LISTEN) php-fpm 22904 fc 0u IPv4 0x5a9bc9209264e227 0t0 TCP 127.0.0.1:9000 (LISTEN) nginx 22931 fc 6u IPv4 0x5a9bc9208c304cc7 0t0 TCP *:8080 (LISTEN) nginx 22932 fc 6u IPv4 0x5a9bc9208c304cc7 0t0 TCP *:8080 (LISTEN) 

Any clue about the issue why nginx downloads php files rather than interpreting them?

EDIT1:
Full nginX configuration:

http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; server { listen 8080; server_name localhost; location / { root html; index index.html index.htm; } location ~ \.php$ { root /usr/local/var/www/; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name; include fastcgi_params; } } include servers/*; 

The URL I have fetched is: http://localhost:8080/info.php

Does anyone has any clue about this issue? I went on every question in stackoverflow with no success:

http://serverfault.com/questions/563285/nginx-with-php-fpm-downloading-php-files-rather-than-executing-them-on-mac-os-x?rq=1 http://serverfault.com/questions/412079/nginx-php-fpm-php-file-not-found-cant-figure-out-why?rq=1 

Answer 1

I've just changed the below line:

fastcgi_param SCRIPT_FILENAME $scripts$fastcgi_script_name; 

TO:

fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; 

It works now.