Answers for "install php 8.1.4"

ubuntu install php 8

# Ubuntu 20.04
# List existing PHP packages
dpkg -l | grep php | tee packages.txt

#Add ondrej/php PPA
sudo add-apt-repository ppa:ondrej/php # Press enter when prompted.
sudo apt-get update

#Install PHP 8.0 with CLI
sudo apt install php8.0-common php8.0-cli

#Additional extensions
sudo apt install php8.0- { bz2,curl,intl,mysql,readline,xml }

install php7.4 in linux server

For install all important php 7.4 extensions
apt install php7.4-common php7.4-mysql php7.4-xml php7.4-xmlrpc php7.4-curl php7.4-gd php7.4-imagick php7.4-cli php7.4-dev php7.4-imap php7.4-mbstring php7.4-opcache php7.4-soap php7.4-zip php7.4-intl -y