Paul's PHP Version Manager

ppvm.sh

#!/usr/bin/env bash

##
 # Paul's PHP version manager. Runs on Homebrew.
 #
 # @param  {string} $version PHP version to switch to or install.
 # @return {void}
 #
 # @see    https://github.com/shivammathur/homebrew-php
 ##
function ppvm() {
  if [[ $(which brew) == 'brew not found' ]]; then
    echo -n '[ppvm] Homebrew is not installed. Would you like to install it? [y/n]: '
    read SHOULD_INSTALL
    if [[ $SHOULD_INSTALL == y ]] then;
      echo '[ppvm] Installing Homebrew...'
      /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
    else
      echo '[ppvm] PPVM requires Homebrew: https://brew.sh/'
      return 1
    fi
  fi

  local -r EARLIEST_VERSION=5.6
  local -r LATEST_VERSION=8.4
  local -r CURRENT_VERSION=$(php --version | egrep -o "\d*\.\d*" | head -n 1) >& /dev/null
  local -r VERSION=${${1:-$CURRENT_VERSION}:-$LATEST_VERSION}
  local -r IS_INSTALLED=$(brew ls --versions "php@$VERSION")

  if [[ $VERSION < $EARLIEST_VERSION ]]; then
    echo "[ppvm] unsuppored PHP version ($VERSION)"
    return 1
  fi

  if [[ ! $VERSION =~ '[0-9]+\.[0-9]+' ]]; then
    echo "[ppvm] invalid PHP version ($VERSION)"
    return 1
  fi

  if [[ $CURRENT_VERSION == $VERSION ]]; then
    php --version
    return 0
  fi

  echo "[ppvm] unlinking PHP $CURRENT_VERSION... "
  brew unlink "php@$CURRENT_VERSION" > /dev/null
  brew unlink "shivammathur/php/php@$CURRENT_VERSION" > /dev/null

  if [[ $IS_INSTALLED ]]; then
    echo "[ppvm] upgrading PHP $VERSION... "
    brew upgrade "shivammathur/php/php@$VERSION" > /dev/null
  else
    echo "[ppvm] installing PHP $VERSION... "
    brew tap shivammathur/php > /dev/null
    brew install "shivammathur/php/php@$VERSION" > /dev/null
  fi

  echo "[ppvm] switching to PHP $VERSION... "
  brew link --force --overwrite "shivammathur/php/php@$VERSION" > /dev/null

  echo "[ppvm] updating path..."
  export PATH="$(echo $PATH | sed -E 's/\/usr\/local\/opt\/php(@[0-9]+\.[0-9]+)?\/s?bin:?//g'):/usr/local/opt/php@$VERSION/bin:/usr/local/opt/php@$VERSION/sbin"
  php --version
}

function ppvm_cleanup() {
  rm -rf $(brew --cellar)/php

  rm -f ~/Library/LaunchAgents/homebrew.mxcl.php*
  rm -f /Library/LaunchAgents/homebrew.mxcl.php*
  rm -f /Library/LaunchDaemons/homebrew.mxcl.php*

  brew untap homebrew/php
  brew untap exolnet/deprecated

  brew cleanup
}