helper script for switching PHP versions

switch-php.sh

#!/bin/bash

###
# Script for switching PHP versions
# Ubuntu 16.x dual php install. 
# Instructions on how to set this up: http://robosparrow.github.io/2016/12/10/php-5-on-ubuntu16.html
###

GREEN="$(tput setaf 2)"
RED="$(tput setaf 1)"
RESET="$(tput sgr0)"

VERSION="$(php --version | head -n 1 | cut -d " " -f 2 | cut -c 1,3)"

if [ $VERSION = 56 ]
    then
        #switch to php 7.1.x
        echo "${GREEN}Switching to PHP 7.1.x...${RESET}"
        sudo a2dismod php5.6 && sudo a2enmod php7.1 && sudo update-alternatives --set php /usr/bin/php7.1 && sudo service apache2 restart && echo "${GREEN}$(php --version | head -n 1)${RESET}"
elif [ $VERSION = 71 ]
    then
        #switch to php 5.6.x
         echo "${GREEN}Switching to PHP 5.6.x ...${RESET}"
        sudo a2dismod php7.1 && sudo a2enmod php5.6 && sudo update-alternatives --set php /usr/bin/php5.6 && sudo service apache2 restart && echo "${GREEN}$(php --version | head -n 1)${RESET}"
else
        echo "${RED}Version not recognised${RESET}: ${VERSION}, found: $(php --version)"
        exit
fi