Change PHP version on MacOS with Home Brew

cli.sh

# show php version i.e. 7.3.8
php -v

# update brew to latest
brew update

# to show all php versions available i.e. [email protected]
brew search php 

# install it
brew install [email protected]

# it will tell you to run some commands suited to your system i.e.
echo 'export PATH="/usr/local/opt/[email protected]/bin:$PATH"' >> ~/.zshrc
echo 'export PATH="/usr/local/opt/[email protected]/sbin:$PATH"' >> ~/.zshrc

# close your terminal window and open a new one