As of this writing, the latest Laravel Valet requires PHP 7.2. What if you still have legacy projects or Drupal 6 modules you maintain that can't run under PHP 7.2? It would be nice if Laravel Valet has option to run multiple PHP versions but there isn't one. Laravel Valet uses nginx + php-fpm and we can tap to nginx and php-fpm's configurations to make possible to run our legacy projects in PHP 5.6. This will make our nginx running both PHP 7.2 and PHP 5.6.