I have an old MacBook Pro running Catalina OS so Homebrew doesn't support my upgrade from php 8.0 to php 8.1. I managed to install php 8.1 using MacPorts instead of Homebrew:
php -v 
PHP 8.1.24 (cli) (built: Oct  2 2023 08:40:04) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.24, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.24, Copyright (c), by Zend Technologies
Is there anyway I can use Valet with this php version? When I try to use it Valet says it's not installed and tries to install it again via Homebrew:
valet use php81 
Installing [email protected]...
[[email protected]] is not installed, installing it now via Brew... 
Thank you!
                        
Valet doesn't support Macports, only Homebrew
https://github.com/laravel/valet/issues/926