Nginx가 내 PHP 파일을 실행하는 대신 다운로드로 제공하는 이유는 무엇입니까?

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

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

        # Make site accessible from http://localhost/
        server_name localhost;

               location ~ \.php$ {
                    try_files $uri =404;
                    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    ## 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
            }
}

sudo service nginx restart
sudo service php5-fpm restart