Nginx serves .php files as downloads, instead of executing them

I am installing a website in a droplet (Digital Ocean). I have a issue for install NGINX with PHP properly. I did a tutorial https://www.digitalocean.com/community/tutorials/how-to-install-linux-nginx-mysql-php-lemp-stack-on-ubuntu-14-04 but when I try to run some .php file it’s just downloading it…
for example… http://5.101.99.123/info.php it’s working but… If I go to the main http://5.101.99.123 it’s downloading my index.php :/

Any idea?

-rw-r--r--  1 agitar_user www-data   418 Jul 31 18:27 index.php
-rw-r--r--  1 agitar_user www-data    21 Aug 31 11:20 info.php

My /etc/nginx/sites-available/default

server {
        listen 80 default_server;
        listen [::]:80 default_server ipv6only=on;

        root /var/www/html;
        index index.html index.htm index.php;

        # Make site accessible from http://localhost/
        server_name agitarycompartir.com;

               location ~ \.php$ {
                    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    ## NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini
    #
    #               # With php5-cgi alone:
    #               fastcgi_pass 127.0.0.1:9000;
    #               # With php5-fpm:
                    fastcgi_pass unix:/var/run/php5-fpm.sock;
                    fastcgi_index index.php;
                    include fastcgi_params;
            }
  

              location / {
                    
                    try_files $uri $uri/ =404;
                    # Uncomment to enable naxsi on this location
                    # include /etc/nginx/naxsi.rules
            }

…

Others “location” are commented…

.