Upgrade to PHP 7.4 with Homebrew on Mac

New in PHP 8.3

# Upgrading with Homebrew

Start by making sure brew is up-to-date:

brew update

Next, upgrade PHP:

brew upgrade php

Check the current version by running php -v:

php -v

Restart Nginx or Apache:

sudo nginx -s reload

sudo apachectl restart

And make sure that your local web server also uses PHP 7.4 by visiting this script:

# index.php, accessible to your web server

phpinfo(); die();

The version should show 7.4.x.

Note: if you're using Laravel Valet, please keep on reading, you need some extra steps in order for the web server to properly work.

# Valet

If you're using Laravel Valet, you should do the following steps to upgrade it:

composer global update

Now run valet install:

valet install

# Extensions

Homebrew doesn't support the installation of PHP extensions anymore, you should use pecl instead. I personally use Imagick, Redis and Xdebug.

They can be installed like so:

pecl install imagick
pecl install redis
pecl install xdebug

You can run pecl list to see which extensions are installed:

pecl list

# Installed packages, channel pecl.php.net:
# =========================================
# Package Version State
# imagick 3.4.4   stable
# redis   5.1.1   stable
# xdebug  2.8.0   stable

You can search for other extensions using pecl search:

pecl search pdf

# Retrieving data...0%
# ..
# Matched packages, channel pecl.php.net:
# =======================================
# Package Stable/(Latest) Local
# pdflib  4.1.2 (stable)        Creating PDF on the fly with the PDFlib library

Make sure to restart your web server after installing new packages:

sudo nginx -s reload

sudo apachectl restart

If you're using Laravel Valet, you should restart it as well.

valet restart

Make sure all extensions are correctly installed and loaded by checking both your PHP webserver and CLI installs:

php -i | grep redis

var_dump(extension_loaded('redis'));

If extensions aren't properly loaded, there are two easy fixes.

First, make sure the extensions are added in the correct ini file. You can run php --ini to know which file is loaded:

Configuration File (php.ini) Path: /usr/local/etc/php/7.4
Loaded Configuration File:         /usr/local/etc/php/7.4/php.ini
Scan for additional .ini files in: /usr/local/etc/php/7.4/conf.d
Additional .ini files parsed:      /usr/local/etc/php/7.4/conf.d/ext-opcache.ini,
/usr/local/etc/php/7.4/conf.d/php-memory-limits.ini

Now check the ini file:

extension="redis.so"
extension="imagick.so"
extension="xdebug.so"

Note that if you're testing installed extensions via the CLI, you don't need to restart nginx, apache or Valet.

The second thing you can do, if you're updating from an older PHP version which also used pecl to install extension; is to reinstall every extension individually.

pecl uninstall imagick
pecl install imagick

# Last step

Finally you should test and upgrade your projects for PHP 7.4 compatibility.