Install PHP 8.0 for Apache and Nginx on Ubuntu 20.04

To have your Ubuntu 20.04 server installed with the latest version of PHP is actually really easy. And I mean, súper easy. See for yourself by reading the rest of this article. The only thing that has to be done is add the well-known Ondrej repository, like this:

sudo apt install software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt update

Install PHP8 as module for Apache

sudo apt install php8.0 libapache2-mod-php8.0

Don't forget to restart Apache after this:

sudo systemctl restart apache2

Setup PHP-FPM for Apache

sudo apt install php8.0-fpm libapache2-mod-fcgid

Afterwards you'll need to enable the modules for Apache like this:

sudo a2enmod proxy_fcgi setenvif
sudo a2enconf php8.0-fpm
sudo systemctl restart apache2

Installing PHP 8.0 for Nginx

Nginx doesn't have inbuilt support for PHP so we'll just use fpm and have it run as a separate service.

sudo apt install php8.0-fpm

You can now edit the Nginx server block and add the following lines so that Nginx can actually process PHP files:

server {
    # . . . your other code

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php8.0-fpm.sock;
    }
}

We must also edit the php.ini for php-fpm for use with Nginx. This is not required if you only use Apache.

sudo nano /etc/php/8.0/fpm/php.ini

Search for "cgi.fix_pathinfo" (it's on line 807 approx) and un-comment this line and change the variable to "0" so it looks like this:

cgi.fix_pathinfo=0

Save the file and restart the php-fpm process. And of course we'll need to restart Nginx to load this new config we changed earlier.

sudo systemctl restart nginx php8.0-fpm

Installing additional PHP extensions

PHP can be enhanced by installing some PHP extensions, although this is not required. A lot of extensions exist and it is for you to decide if you need this functionality. As an example we'll install these handful of very popular extensions.

sudo apt install -y php8.0 php8.0-common php8.0-gd php8.0-mysql php8.0-imap php8.0-cli php8.0-cgi php8.0-curl php8.0-intl php8.0-pspell php8.0-sqlite3 php8.0-tidy php8.0-xmlrpc php8.0-xsl php8.0-zip php8.0-mbstring php8.0-soap php8.0-opcache php-pear php-imagick php-apcu

Test it out

Let's see if it works! Create a new file in your web server's root folder.

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

Paste this one line of code in the new file and save it:

<?php phpinfo();

To set the proper user and group use this command

sudo chown -R www-data:www-data /var/www/html

Now open a browser and go to this address: http://your_server_ip/info.php
You'll see a page looking like the screenshot below. This means it's working! Good job!