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Switch between multiple PHP versions on your mac

This article is a slimmed-down, firing-from-the-hips, get right to the action version based on the ones listed below. If you miss some background info or want a more spelled out version, please do visit these articles:

Install multiple PHP versions with fpm

I’d also install the xdebug extension.

versions="php56 php70 php71 php72"
for version in $versions; do
    brew install $version --with-fpm
    brew install $version-xdebug
    brew unlink $version

If you receive the error `configure: error: Cannot find libz` you need to install required libraries via XCode:

xcode-select --install
brew upgrade

Switch PHP-version

To switch the active version of PHP use the command sphp (script for this command is further down below):

sphp 71

PHP version 71 found
Unlinking old binaries...
Linking new binaries...
Linking /usr/local/Cellar/php71/7.1.10_21... 17 symlinks created
Linking new modphp addon...
Fixing LoadModule...
Updating version file...

PHP 7.1.10 (cli) (built: Oct  6 2017 01:08:19) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies
    with Xdebug v2.5.5, Copyright (c) 2002-2017, by Derick Rethans

Without arguments, this command returns useful information like which versions are installed and which is the active one right now:

$ sphp
Usage: sphp [phpversion]
Versions installed:
 - phpversion: 56
 - phpversion: 70
 - phpversion: 71
 - phpversion: 72

Currently active version: 56

Create script for easy switching

In order for this to work, create the following script: /usr/local/bin/sphp


# Check if command was ran as root.
if [[ $(id -u) -eq 0 ]]; then
    echo "The command \"sphp\" should not be executed as root or via sudo directly."
    echo "When a service requires root access, you will be prompted for a password as needed."
    exit 1

# Usage
if [ $# -ne 1 ]; then
    echo "Usage: sphp [phpversion]"
    echo "Versions installed:"
    brew list | grep '^php[0-9]\{2,\}$' | grep -o -E '[0-9]+' | while read -r line ; do
        echo " - phpversion: $line"
    exit 1

currentversion="`php -r \"error_reporting(0); echo str_replace('.', '', substr(phpversion(), 0, 3));\"`"


brew list php$newversion 2> /dev/null > /dev/null

if [ $? -eq 0 ]; then
    echo "PHP version $newversion found"

    # Check if new version is already the current version.
    # if [ "${newversion}" == "${currentversion}" ]; then
    #     echo -n "PHP version ${newversion} is already being used. Continue by reloading? (y/n) "
    #     while true; do
    #         read -n 1 yn
    #         case $yn in
    #             [Yy]* ) echo && break;;
    #             [Nn]* ) echo && exit 1;;
    #         esac
    #     done
    # fi

    echo "Unlinking old binaries..."
    brew unlink php$currentversion 2> /dev/null > /dev/null

    echo "Linking new binaries..."
    brew link php$newversion --force

    echo "Linking new modphp addon..."
    sudo ln -sf `brew list php$newversion | grep libphp` /usr/local/lib/libphp${majorNew}.so
    echo /usr/local/lib/libphp${majorNew}.so
    echo "Fixing LoadModule..."
    apacheConf=`httpd -V | grep -i server_config_file | cut -d '"' -f 2`
    sudo sed -i -e "/LoadModule php${majorOld}_module/s/^#*/#/" $apacheConf

    if grep "LoadModule php${majorNew}_module .*php${newversion}" $apacheConf > /dev/null
        sudo sed -i -e "/LoadModule php${majorNew}_module .*php${newversion}/s/^#//" $apacheConf
        sudo sed -i -e "/LoadModule php${majorNew}_module/s/^#//" $apacheConf

    echo "Updating version file..."

    pgrep -f /usr/sbin/httpd 2> /dev/null > /dev/null
    if [ $? -eq 0 ]; then
        echo "Restarting system Apache..."
        sudo pkill -9 -f /usr/sbin/httpd
        sudo /usr/sbin/apachectl -k restart > /dev/null 2>&1

    pgrep -f /usr/local/"Cellar|opt"/*/httpd 2> /dev/null > /dev/null
    if [ $? -eq 0 ]; then
        echo "Restarting homebrew Apache..."
        sudo pkill -9 -f /usr/local/"Cellar|opt"/*/httpd
        sudo /usr/local/bin/apachectl -k restart > /dev/null 2>&1

    # pgrep -x httpd 2> /dev/null > /dev/null
    # if [ $? -eq 0 ]; then
    #     echo "Restarting non-root homebrew Apache..."
    #     httpd -k restart > /dev/null 2>&1
    # fi

    echo "Done."

    # Show PHP CLI version for verification.
    echo && php -v
    echo "PHP version $majorNew.$minorNew was not found."
    echo "Try \`brew install php${newversion}\` first."
    exit 1