arc diff(Arcanist) failing with env: php: No such file or directory

Question

After upgrading to macOS Monterey Arcanist commands like arc diff are failing with the following error

env: php: No such file or directory

Answer 1

Step1

brew install php@7.4
ln -s /usr/local/opt/php@7.4/bin/php /usr/local/bin/php

if u get an error on the step 1 run this

xcode-select --install