The PHP 8 benchmarks are looking really sexy! More performance improvements are always welcome over PHP 7.4 🙂
Check out this in-depth list of the new PHP 8 features.
Remember to test the new PHP 8.0 in a staging environment for your WordPress or WooCommerce site first, ideally on a separate server. If you need help testing this feel free to get in touch.
This tutorial will show you how to install PHP 8.0 on Ubuntu 18.04 and update the CLI path to use the new PHP version.
Install PHP 8.0 php-fpm on Ubuntu 18.04
Start with adding the repository kindly provided by sury.org
sudo apt-get install apt-transport-https -y sudo wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg echo "deb https://packages.sury.org/php/ stretch main" | sudo tee /etc/apt/sources.list.d/php.list
Update your package list
sudo apt-get update
Install the PHP 8.0 packages for nginx and php-fpm functionality
sudo apt-get install php8.0-cli php8.0-curl php8.0-mysql php8.0-fpm php8.0-gd php8.0-xml php8.0-mbstring php8.0-zip php8.0-soap php8.0-dev -y
Now we can update the PHP command line binary shorthand
php to use the PHP 8.0 CLI binary.
Update PHP CLI to 8.0
Test your current PHP CLI version with this command
Output here is showing PHP 7.4!
PHP 7.4.13 (cli) (built: Nov 28 2020 06:24:43) ( NTS ) Copyright (c) The PHP Group Zend Engine v3.4.0, Copyright (c) Zend Technologies with Zend OPcache v7.4.13, Copyright (c), by Zend Technologies
Update the CLI shortcut to use the 8.0 binary with this command
sudo update-alternatives --set php /usr/bin/php8.0
Now make sure it worked
Output is now showing PHP 8.0 🙂
PHP 8.0.0 (cli) (built: Nov 27 2020 12:26:05) ( NTS ) Copyright (c) The PHP Group Zend Engine v4.0.0-dev, Copyright (c) Zend Technologies with Zend OPcache v8.0.0, Copyright (c), by Zend Technologies
Remember to configure PHP-FPM for low memory consumption with this guide.