If you have ever installed WordPress on Ubuntu 18.04 or similar you may have noticed the WordPress warning in site health dashboard for the included default of old PHP 7.2. – “PHP is the programming language used to build and maintain WordPress. Newer versions of PHP are created with increased performance in mind, so you may see a positive effect on your site’s performance. The minimum recommended version of PHP is 7.4.” Furthermore if you do any experimenting with Laravel you may have issues because the latest Laravel 8 is only compatible with PHP7.3 and newer, among other changes.
Although there have been tutorials for the Ondrej PHP PPA, I didn’t see notes for Nginx updates, only that an Nginx separate PPA is recommended. To set this, first install php7.4 and related libraries:
sudo add-apt-repository ppa:ondrej/php sudo update-alternatives --config php sudo apt install php7.4 php7.4-mysql php7.4-mbstring php7.4-curl php7.4-imagick php7.4-readline php7.4-xml php7.4-yaml php7.4-zip sudo apt install php7.4-fpm
Verify what version you have set, 7.4 should now be the choice:
sudo update-alternatives --config php
Now copy the directory with Nginx configuration, before editing your configuration to user php7.4-fpm:
cp -r /etc/nginx/sites-available/ ~/bkup-sites-available sudo vim /etc/nginx/sites-available/default # or whatever config file you have
This replaces those php7.2-fpm.sock references with php7.4-fpm.sock. (You could do this with any other text editor manually too).
After saving (“Shift+double tap Z key), a restart of Nginx loads the newer PHP:
sudo service nginx restart
and now you shouldn’t have those warnings or errors in WordPress or Laravel.