Use old versions of PHP with Laravel Valet via Homebrew

gistfile1.md

Homebrew removes old versions of php

And, since Laravel Valet uses Homebrew in it's valet use php@X.X command,
that means trying to install php@7.1 now breaks because Homebrew removed it from it's core.

To install php@7.1 with Homebrew

We need to tap a barrel that has the php@7.1 formula.

brew tap exolnet/homebrew-deprecated

^this is a tap I found that had the php@7.1 and php@5.6 formulas

Now we can call, as normal:

valet use php@7.1

...as well as the standard brew commands

brew install php@7.1
brew link php@7.1

That worked but wasn't enough for me. I had to reinstall PHP 7.1 from source.

$ brew list --versions icu4c
icu4c 66.1

$ brew list --versions openssl
openssl@1.1 1.1.1g

$ brew reinstall --build-from-source php@7.1

$ php -v