php switches

TO PHP8.1

    brew unlink php
    brew link --force --overwrite php@8.1
    php -v

TO PHP8.2

    brew unlink php
    brew link --force --overwrite php@8.2
    php -v

TO PHP7.4

    brew unlink php
    brew link --force --overwrite php@7.4
    export PATH="/usr/local/opt/php@7.4/bin:$PATH"
    php -v