phpversion

#!/bin/bash

# Check if PHP is installed
if [[ ! $(php -v 2> /dev/null) ]]; then
    echo "ERROR: PHP is not installed, run the phpinstall script"
    exit 1
fi

# Current PHP version
echo "Current PHP version : $(php -v | head -n 1 | cut -d ' ' -f 2 | cut -d - -f 1)"

# Available PHP versions
phpversions=$(update-alternatives --list php | cut -d p -f 3 | grep [0-9])

if [ -z "$1" ]; then
    # Target version was not given
    echo -e "\nAvailable versions :"
    echo -e "$phpversions\n" | tr " " "\n"
    read -p "Target version : " version
    echo ""
else
    # Target version was given
    version="$1"
    echo "Target version : $version"
fi

# Validate input
if ! echo $phpversions | grep -w $version > /dev/null; then
    echo "ERROR: PHP version '$version' not found"
    exit 2
fi


# The actual PHP version switch
if ! sudo update-alternatives --set php /usr/bin/php$version &> /dev/null; then
    echo -e "ERROR: Could not switch PHP version"
    exit 3
fi

## Switch PHP version for other tools (if they exist)
sudo update-alternatives --set phar /usr/bin/phar$version &> /dev/null
sudo update-alternatives --set phar.phar /usr/bin/phar.phar$version &> /dev/null
sudo update-alternatives --set phpize /usr/bin/phpize$version &> /dev/null
sudo update-alternatives --set php-config /usr/bin/php-config$version &> /dev/null

# Switch apache PHP version (if installed)
if [[ $( command -v apachectl ) ]]; then
    # Disable current php apache modules, if any
    sudo a2dismod "php*" &> /dev/null
    # Enable new php apache modules
    if ! sudo a2enmod php$version &> /dev/null; then
        echo -e "WARNING: Could not enable php$version apache module"
    # Restart apache (if the server is on)
    elif [[ $( ps -eo comm | grep apache 2> /dev/null ) ]] && ! sudo service apache2 restart &> /dev/null; then
        echo -e "WARNING: Could not restart apache"
    fi
fi

# Yay !
echo "Current PHP version : $(php -v | head -n 1 | cut -d ' ' -f 2 | cut -d - -f 1)"