How to install PHP (7, 7.2 or 7.3) on Ubuntu Reset the MySQL 5.7 root password in Ubuntu 16.04 LTS Install Laravel 5.7, PHP 7.3 and NGINX on Ubuntu Basic PHP 7 and Nginx Configuration on Ubuntu 16.04 Linux

Step 1: Install NGINX as Web Server

sudo apt-get update && apt-get upgrade
sudo apt install nginx

sudo service nginx status

Step 2: Configuration the Firewall with UFW

sudo ufw allow OpenSSH
sudo ufw allow 'Nginx HTTP'

Now enable ufw for Firewall.

sudo ufw enable
sudo ufw status

Step 3: Install PHP 7.3 FPM and Related Modules

sudo apt-get install software-properties-common
sudo apt-get update

Once the PPA repository has been added and updated, now we are going to install PHP 7.3

#install PHP 7.3
sudo apt-get install php7.3-fpm php7.3-cli php7.3-mysql php7.3-gd php7.3-imagick php7.3-recode php7.3-tidy php7.3-xmlrpc php7.3-common php7.3-curl php7.3-mbstring php7.3-xml php7.3-bcmath php7.3-bz2 php7.3-intl php7.3-json php7.3-readline php7.3-zip
#apt-get install php-pear php7.3-curl php7.3-dev php7.3-gd php7.3-mbstring php7.3-zip php7.3-mysql php7.3-xml

To set PHP 7.3 as the default, run:

update-alternatives --set php /usr/bin/php7.3

To verified PHP 7.3 was installed correctly on the web server, you may check the PHP version

sudo php -v
or 
sudo php -me

To install PHP FastCGI Process Manager(fpm)

sudo apt-get install php7.3-fpm
or
sudo apt-get install php7.2-fpm
or
sudo apt-get install php7.1-fpm

The default location of the PHP socket that Nginx List the contents for the directory /var/run/php/

ls /var/run/php/

You will see the output like below, note this below we are going to use for the next server block configuration

php7.3-fpm.pid php7.3-fpm.sock

Step 4: Configure PHP file (Optional)

sudo vi /etc/php/7.3/fpm/php.ini

error_reporting = E_COMPILE_ERROR | E_RECOVERABLE_ERROR | E_ERROR | E_CORE_ERROR
max_input_time = 30
error_log = /var/log/php/error.log
file_uploads = On
allow_url_fopen = On
memory_limit = 256M
upload_max_filesize = 100M
max_execution_time = 360
date.timezone = America/Los_Angeles

Step 5:Configuration Server Blocks

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

server {
    listen 80;
    listen [::]:80;
    root /var/www/html/lab-axfon/public;
    index index.php index.html index.htm;
    server_name lab.axfon.com;

    location / {
         try_files $uri $uri/ /index.php?$args;        
    }

    location ~ \.php$ {
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        include snippets/fastcgi-php.conf;
        #
        #       # With php-fpm (or other unix sockets):
        fastcgi_pass unix:/var/run/php/php7.3-fpm.sock;
        #       # With php-cgi (or other tcp sockets):
        #       fastcgi_pass 127.0.0.1:9000;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    }

}

sudo service nginx restart

Step 5: install MySQL

sudo apt-get install mysql-server mysql-client

Step 6: install phpMyAdmin

sudo apt-get install phpmyadmin
sudo ln -s /usr/share/phpmyadmin/ /var/www/phpmyadmin