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# Test PHP in console
# installl
$ composer g require psy/psysh:@stable
$ psysh
# then add PATH to the shell config
# add this line in .bash_profile
export PATH="/Users/zhoux/.composer/vendor/bin:$PATH"
# More about psysh
https://psysh.org/ (opens new window)
# Install PHP via brew
brew install php@7.4
==> Summary
🍺 /usr/local/Cellar/php@7.4/7.4.14_1: 497 files, 72.2MB
# Switch PHP version
first of all, check the list of all installed php versions and current version
$ ls -al /usr/local/etc/php/
$ ls -al /usr/local/opt/ | grep php
lrwxr-xr-x 1 zhoux admin 21 Jan 31 19:17 php -> ../Cellar/php/8.0.1_1
lrwxr-xr-x 1 zhoux admin 26 Jan 31 18:08 php@7.2 -> ../Cellar/php@7.2/7.2.34_1
lrwxr-xr-x 1 zhoux admin 26 Jan 31 19:16 php@7.3 -> ../Cellar/php@7.3/7.3.26_1
lrwxr-xr-x 1 zhoux admin 26 Jan 31 19:17 php@7.4 -> ../Cellar/php@7.4/7.4.14_1
lrwxr-xr-x 1 zhoux admin 21 Jan 31 19:17 php@8.0 -> ../Cellar/php/8.0.1_1
$ php -v
PHP 8.0.1 (cli) (built: Jan 8 2021 09:07:02) ( NTS )
then, create command alias to switch php via brew link
alias php74 'brew unlink php && brew link --overwrite --force php@7.4'
alias php80 'brew unlink php && brew link --overwrite --force php@8.0'
at last, type php80 or php74 to switch php
reference