NGINX 404 all pages - nginx

Question

So I have two issues that I am trying to do. First I am trying to understand NGINX and use it for redirects and everything as well; however, if I try to remove the extensions from the php / html files it just downloads the file. If I use another thing to just try (without the file extension try) it just gives me 404s. I am not sure what the issue is nor what I am doing wrong.
First I'll show my remove php file extension issue:
server {
listen 443;
server_name XXX.XX.XX.XX;
root /var/www/html;
location / {
try_files $uri $uri.html $uri/ #extensionless-php;
index index.html index.htm index.php;
}
location ~ \.php$ {
try_files $uri =404;
}
location #extensionless-php {
rewrite ^(.*)$ $1.php last;
}
}
Here is my other code to fix the problem above (but just gives me 404s)
server {
listen 443;
server_name XXX.XX.XX.XX;
root /var/www/html;
index index.php index.html index.htm;
location / {
try_files $uri $uri/ =404;
}
error_page 404 /404.html;
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /var/www/html;
}
location ~ \.php$ {
try_files $uri =404;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
}
XXX.XX.XX.XX is my the servers ip.
PS: I have read that I need the bottom section first to get the top section working.
Sources include:
How to remove both .php and .html extensions from url using NGINX?
https://www.digitalocean.com/community/tutorials/how-to-install-linux-nginx-mysql-php-lemp-stack-on-ubuntu-14-04
Ty for your help.
UPDATES:
Kuldeep KD - 770 /var/www/html (not solution but thanks)
Jignesh Joisar - Trying port 80 (failed but per usual thanks)

Answer 1

Check for necessary permissions on /var/www/html
you can change the permissions using
chmod -R 770 /var/www/html/
also check for the owner of directory you may have to change that as well, depends on user your nginx is using.
chown -R user:group /var/www/html

Answer 2

try to this one in 80 port
server {
listen 80 default_server;
root /var/www/html/;
# Add index.php to the list if you are using PHP
index index.php index.html index.htm;
server_name localhost;
error_page 404 /404.html;
error_page 500 502 503 504 /50x.html;
location / {
# First attempt to serve request as file, then
# as directory, then fall back to displaying a 404.
try_files $uri $uri/ /index.php$is_args$args;
}
# pass PHP scripts to FastCGI server
#
location ~ \.php$ {
try_files $uri /index.php =404;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
location ~ /\.ht {
deny all;
}
}