php --version
# zsh: command not found: php
After I upgraded to Monterey I updated my homebrew version of php (from 8.0.5 to 8.012) but installation didn't successfully ended.
The installation created a folder flagged by homebrew with a '.reinstall' :
/usr/local/Cellar/php/8.0.12.reinstall
The php update failure was caused by my Xcode Command Line Tools being deprecated. Homebrew stated it in its installation report (but I didn't noticed it at first). What's weird is I did upgrade Xcode after upgrading to Monterey but for some reason the Xcode Command Line tools were not (as they should have).
Time to upgrade Xcode cli tools:
xcode-select --install
A prompt informed me that "The xcode-select command requires the command line developer tools. Would you like to install the tools now?" I clicked yes and installation took ages but eventually got cli tools installed.
I then re-installed php:
brew install php
And that fixed my php installation!