INSTALLATION SHELL SCRIPT PHP COMPOSER

!/bin/bash

Check wether composer installed or not:

  if [ ! -x /usr/local/bin/composer ]; then

echo "INSTALLING composer"

Checks the current php version & Install the dependencies:

    CURRENT=$(php -v | head -n 1 | cut -d " " -f 2 | cut -f1-2 -d".")

echo "Y" | apt install curl php$CURRENT-cli php$CURRENT-mbstring git unzip

Change the path to tilde directory & Downloads the composer setup file:

     cd ~

curl -sS https://getcomposer.org/installer -o composer-setup.php

It gets SHA384 composer value:

    HASH=$(curl https://composer.github.io/installer.sig | awk '{print $1}')

Preparing composer installation setup:

    php -r "if (hash_file('SHA384', 'composer-setup.php') === '$HASH') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"

Installing Composer:

php composer-setup.php --install-dir=/usr/local/bin --filename=composer

Removes the downloaded setup file:

rm -rf ~/composer-setup.php

Message showing successfully installed:

   echo "SUCESSFULLY INSTALLED composer"

During Initial check if composer installed already it shows message:

    else
echo "ALREAY INSTALLED composer"
    fi

Installation shell script for php-composer available in github repo