Install the available php version for your ubuntu system

install-php.sh

#!/bin/bash

# Install PHP runtime

PHPV=$(echo $(apt search php7. | grep '^php7\.' | head -1) | tr "/" "\n" | head -1)

sudo apt install \
  $PHPV \
  $PHPV-cli \
  $PHPV-cgi \
  $PHPV-common \
  $PHPV-bz2 \
  $PHPV-curl \
  $PHPV-dba \
  $PHPV-dev \
  $PHPV-fpm \
  $PHPV-json \
  $PHPV-mbstring \
  $PHPV-mysql \
  $PHPV-odbc \
  $PHPV-opcache \
  $PHPV-pgsql \
  $PHPV-readline \
  $PHPV-soap \
  $PHPV-sqlite3 \
  $PHPV-sybase \
  $PHPV-xml \
  $PHPV-xsl \
  $PHPV-zip \
  -y
  
  
# Install composer

curl -o- https://getcomposer.org/installer | php
sudo mv ./composer.phar /usr/local/bin/composer

echo "export PATH=\$HOME/.config/composer/vendor/bin/:\$PATH" >> ~/.zshrc

composer global require "squizlabs/php_codesniffer=*"