Configuration of Nginx VirtualHost
The initial step to configure Nginx VirtualHost is to go to its web root directory and create two directories as follows.

jaforiqbal@jaforiqbal-X510UA:/home/user1# cd /var/www/html/
jaforiqbal@jaforiqbal-X510UA:/var/www/html# mkdir site1 site2

Once the directories are created, use the following command to create a file with text in the site1 directory. Repeat the same for site2 directory.

jaforiqbal@jaforiqbal-X510UA: /var/www/html/site1# nano index.html

Now, use the following commands to create server block files.

jaforiqbal@jaforiqbal-X510UA: cp /etc/nginx/sites-available/default /etc/nginx/sites-available/site1.conf
jaforiqbal@jaforiqbal-X510UA: cp /etc/nginx/sites-available/default /etc/nginx/sites-available/site2.conf

Configure the site1.conf file as follows.

jaforiqbal@jaforiqbal-X510UA: nano /etc/nginx/sites-available/site1.conf

server {
	listen 80 ;
	listen [::]:80;

	root /var/www/html/site1;


        index index.php index.html index.htm;

	server_name linuxhelp1.com  www.linuxhelp1.com;


      # pass the PHP scripts to FastCGI server listening on the php-fpm socket
       location ~ \.php$ {
               try_files $uri =404;
               fastcgi_split_path_info ^(.+\.php)(/.+)$;
               fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
               index index.php index.html index.htm;
               fastcgi_index index.php;
	       #fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
               include fastcgi_params;
                
       }


}

Now configure the site2.conf as follows.

jaforiqbal@jaforiqbal-X510UA: nano /etc/nginx/sites-available/site2.conf

server {
	listen 80 ;
	listen [::]:80;

	root /var/www/html/site2;


        index index.php index.html index.htm;

	server_name linuxhelp2.com www.linuxhelp2.com;


      # pass the PHP scripts to FastCGI server listening on the php-fpm socket
       location ~ \.php$ {
               try_files $uri =404;
               fastcgi_split_path_info ^(.+\.php)(/.+)$;
               fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
               index index.php index.html index.htm;
               fastcgi_index index.php;
	       #fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
               include fastcgi_params;
                
       }


}

You can remove the default server block with the following command.

jaforiqbal@jaforiqbal-X510UA: root@linuxhelp1:~# rm /etc/nginx/sites-enabled/default

Now enable the new server block by running the following command.

jaforiqbal@jaforiqbal-X510UA: ln -s /etc/nginx/sites-available/site1.conf /etc/nginx/sites-enabled/
jaforiqbal@jaforiqbal-X510UA: ln -s /etc/nginx/sites-available/site2.conf /etc/nginx/sites-enabled/

You can check the Nginx configuration with the help of below command.

jaforiqbal@jaforiqbal-X510UA: nginx -t

Output should be:
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

After checking the Nginx configuration, restart the Nginx service by running following command.

jaforiqbal@jaforiqbal-X510UA: systemctl restart nginx

Now you have to edit your hosts file by entering your IP address and domain name as below.

jaforiqbal@jaforiqbal-X510UA: nano /etc/hosts

Output should be:
127.0.2.1 www.linuxhelp1.com
127.0.3.1 www.linuxhelp2.com

You can check the VirtualHost configuration by calling http://www.linuxhelp1.com or http://www.linuxhelp1.com on your browser’s address bar.

If it’s not working in any step, Just check the error log by entering the command below.

jaforiqbal@jaforiqbal-X510UA: sudo tail -30 /var/log/nginx/error.log

For more details: Linuxhelp

Steps to install Nginx, PHP 7, Mysql 5 in ubuntu 16.04:

Step 1: Install the Nginx Web Server

 sudo apt-get install nginx

check the ngnix is start

 http://localhost 

Note: Nginx default use the 80 port, hence if you apache install then change the port for ngnix

Step 2: Install MySQL

 sudo apt-get install mysql-server 

set password to the mysql

Step 3: Install PHP

 sudo apt-get install php-fpm php-mysql 

Configure the PHP processor

excute below command to edit php.ini

 sudo vim /etc/php/7.0/fpm/php.ini 

set parameter in PHP.ini

 cgi.fix_pathinfo=0 

Run below command to restart the php-fpm

 sudo service php7.0-fpm restart 

Step 4: Configure Nginx to Use the PHP

Edit below file:

 sudo nano /etc/nginx/sites-available/default 

add index.php file after index line and uncomment php code

 
 # pass the PHP scripts to FastCGI server listening on the php-fpm socket
        location ~ \.php$ {
                try_files $uri =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;
                
        }
 

And restart the nginx using

 sudo service nginx restart 

Step 5: Create a PHP File to Test Configuration
Create file in root directory

 sudo nano /var/www/html/info.php 

and put php tag and “phpinfo()” function

Run file with browser as below

 http://localhost/info.php