Install PHP 8.3

sudo apt install software-properties-common

sudo add-apt-repository ppa:ondrej/php -y

sudo apt update && sudo apt upgrade -y

sudo apt install php8.3 libapache2-mod-php8.3 -y

sudo apt-get install -y php8.3-cli php8.3-common php8.3-mysql php8.3-zip php8.3-gd php8.3-mbstring php8.3-curl php8.3-xml php8.3-bcmath

Install Composer

Step 1 :- sudo apt-get update && sudo apt-get install curl

Step 2 :- sudo curl -s https://getcomposer.org/installer | php

Step 3 :- sudo mv composer.phar /usr/local/bin/composer

Step 4 :- composer -v