php@7.1和php71有什么区别[macOS上的Homebrew]

Question

I ran brew update && brew upgrade this morning and this warning came out:

> ==> Renamed Formulae
php71 ✔ -> php@7.1
==> Deleted Formulae
homebrew/php/php71-gmp        homebrew/php/php71-mcrypt     homebrew/php/php71-pcntl      homebrew/php/php71-pdo-pgsql  homebrew/php/php71-snmp
homebrew/php/php71-intl       homebrew/php/php71-opcache    homebrew/php/php71-pdo-dblib  homebrew/php/php71-pspell     homebrew/php/php71-tidy
==> Processing php71 formula rename to php@7.1
==> Unlinking php71
==> Moving php71 versions to /usr/local/Cellar/php@7.1
==> Relinking php@7.1
Warning: php@7.1 is outdated!
To avoid broken installations, as soon as possible please run:
  brew upgrade
Or, if you're OK with a less reliable fix:
  brew upgrade php@7.1

what does that @ represent?

Answer 1

As said in some comments, the program in itself is the same. It's still PHP, and still version 7.1.

But if you look at the homebrew/core and homebrew/php repositories, you will see that PHP 7.1 has been migrated from homebrew/php to homebrew/core, and it is only the naming that changes.

In homebrew/php it was named php71, and in homebrew/core it's named php@7.1 to separate program and version.