PHP 5.6 Installer for Ubuntu 16.04

php5.6_installer.sh

#!/bin/bash
#===============================================================================
#          FILE: php5.6_installer.sh
#
#         USAGE: ./php5.6_installer.sh
#
#   DESCRIPTION: Install the stable version of the PHP 5.6
#
#       OPTIONS: ---
#  REQUIREMENTS: ---
#          BUGS: ---
#         NOTES: ---
#        AUTHOR: Alejandro Benavides ([email protected]),
#  ORGANIZATION:
#       CREATED: 11/05/2017 15:42
#      REVISION: 1.1
#===============================================================================

USER='ubuntu'

function installPHP() {
    echo "Installing php 5.6 ..."

    sudo apt install -y python-software-properties software-properties-common >/dev/null 2>&1
    sudo add-apt-repository -y ppa:ondrej/php >/dev/null 2>&1
    sudo apt-get update >/dev/null 2>&1
    sudo apt-get install -y \
        php5.6-bz2 \
        php5.6-cli \
        php5.6-common \
        php5.6-curl \
        php5.6-fpm \
        php5.6-gd \
        php5.6-intl \
        php5.6-imap \
        php5.6-json \
        php5.6-ldap \
        php5.6-mysql \
        php5.6-mbstring \
        php5.6-mcrypt \
        php5.6-readline \
        php5.6-soap \
        php5.6-xsl \
        php5.6-xml \
        php5.6-zip \
        php-gettext \
        php-memcached \
        php-xdebug \
        php-mailparse >/dev/null 2>&1

    echo "Configuring PHP"
    sudo sed -i "s,error_reporting =.*,error_reporting = E_ALL,g" /etc/php/5.6/fpm/php.ini
    sudo sed -i "s,display_errors =.*,display_errors = On,g" /etc/php/5.6/fpm/php.ini
    sudo sed -i "s,default_charset =.*,default_charset = \"UTF-8\",g" /etc/php/5.6/fpm/php.ini

    sudo sed -i "s,short_open_tag =.*,short_open_tag = On,g" /etc/php/5.6/fpm/php.ini
    
    sudo sed -i "s,user =.*,user = $USER,g" /etc/php/5.6/fpm/pool.d/www.conf
    sudo sed -i "s,group =.*,group = $USER,g" /etc/php/5.6/fpm/pool.d/www.conf
    sudo sed -i "s,listen.owner =.*,listen.owner = $USER,g" /etc/php/5.6/fpm/pool.d/www.conf
    sudo sed -i "s,listen.group =.*,listen.group = $USER,g" /etc/php/5.6/fpm/pool.d/www.conf
}

# is user root? are params passed?
if [[ $EUID -ne 0 ]] ; then
  echo "Error: This script must be run with root access to install PHP 5.6"
  exit 1
fi

echo "Updating repositories"
sudo apt-get update >/dev/null 2>&1
sudo apt-get -y upgrade >/dev/null 2>&1

installPHP
echo "Installation completed successfully"

Use:
bash -c "$(curl -fsSL https://gist.githubusercontent.com/alejosv/2bc4d63f9e82e15318bf409dc4fc36a0/raw/bc1799ef3f3264ac1d72e0585cd1fd254452bb38/php5.6_installer.sh)"