Bash Script for Switching Between PHP Versions
May 18, 2019·2 min read
Lately, I have to deal with the old codebase that is still using the outdated PHP version. And so I've found my self switching between multiple PHP versions quite often. Since I'm using Homebrew to install the PHP, I need to type these four commands to switch into an older PHP version.
# Stop the latest stable PHP version that's currently running $ brew services stop php $ brew unlink php # Start the old PHP 5.6 version $ brew link firstname.lastname@example.org --force $ brew services start email@example.com
It's not that bad actually, we can easily remember these commands. But since I need to switch between PHP versions quite often, I thought it would be nice to create a simple bash script to save some keystrokes. I've created a similar bash script in the past: brew-php-switch—way before the PHP formulae were merged into the Homebrew core, so it's no longer working now.
Anyway, here's the script:
MAIN_VERSION="7.3" REQUESTED_VERSION="$1" CURRENT_VERSION="$(php --version | head -n 1 | cut -d " " -f 2 | cut -d "." -f 1,2)" if [ -z $REQUESTED_VERSION ]; then REQUESTED_VERSION=$MAIN_VERSION fi if [ $CURRENT_VERSION = $REQUESTED_VERSION ]; then echo "PHP v$CURRENT_VERSION is already active." exit 1 fi if [ $CURRENT_VERSION = $MAIN_VERSION ]; then CURRENT_FORMULA="php" else CURRENT_FORMULA="php@$CURRENT_VERSION" fi if [ $REQUESTED_VERSION = $MAIN_VERSION ]; then REQUESTED_FORMULA="php" else REQUESTED_FORMULA="php@$REQUESTED_VERSION" fi echo "Stopping PHP v$CURRENT_VERSION" brew services stop $CURRENT_FORMULA brew unlink $CURRENT_FORMULA echo "Starting PHP v$REQUESTED_VERSION" brew link $REQUESTED_FORMULA --force brew services start $REQUESTED_FORMULA echo "PHP v$REQUESTED_VERSION is active"
MAIN_VERSION is the latest stable version of PHP available on Homebrew. I hardcoded the
MAIN_VERSION value and use it to check whether the
REQUESTED_VERSION or the
CURRENT_VERSION is using this latest stable version. Unlike the older versions, the formulae for the latest stable version has no version number suffix.
The following line will get the currently running PHP version in
MAJOR.MINOR format (e.g.
CURRENT_VERSION="$(php --version | head -n 1 | cut -d " " -f 2 | cut -d "." -f 1,2)"
Here's how it works:
- Takes the value from the
- Take the first line from the above output.
- Take the second word from that first line (the PHP version part).
- Extract the major and minor version part.
Save this bash script at
/usr/local/bin/phpuse and don't forget to make it executable:
$ chmod +x /usr/local/bin/phpuse
Now, we can save some keystrokes when switching between PHP version:
# Switch to the old PHP 5.6 version $ phpuse 5.6 # Switch back to the latest stable version, don't pass any version argument $ phpuse