Php

Install

sudo apt-get install php -y
sudo apt-get install -y php-{bcmath,bz2,intl,gd,mbstring,mysql,zip} && sudo apt-get install libapache2-mod-php  -y

install 7.4 on mac

From: https://getgrav.org/blog/macos-catalina-apache-multiple-php-versions

From: https://gist.github.com/dtomasi/ab76d14338db82ec24a1fc137caff75b

 brew tap exolnet/homebrew-deprecated
 brew install php@7.4
 LoadModule php7_module /usr/local/opt/php@7.3/lib/httpd/modules/libphp7.so

 brew services start php@7.4
 lsof -Pni4 | grep LISTEN | grep php

 brew unlink php
 brew link php@7.4

install php 8 on ubuntu

With root access:

apt update && apt install -y wget gnupg2 lsb-release
wget https://packages.sury.org/php/apt.gpg && apt-key add apt.gpg
echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" | tee /etc/apt/sources.list.d/php.list
apt update && apt install -y php8.1
php -v # Outputs "PHP 8.1.3 ..."

Composer

sudo apt install composer
composer install