Homebrew fails to upgrade php to 7.4 (fails to install openssl 1.1) High Sierra

Question

I'm trying to upgrade my php from 7.1 to 7.4 in my Mac with High Sierra (10.13.6) using homebrew. So I run:

brew install php@7.4

but it gets stuck at:

==> Installing php@7.4 dependency: openssl@1.1
==> perl ./Configure --prefix=/usr/local/Cellar/openssl@1.1/1.1.1k --openssldir=
==> make
==> make install MANDIR=/usr/local/Cellar/openssl@1.1/1.1.1k/share/man MANSUFFIX
==> make test

If I try to install the openssl package it fails too. It's that package that is causing the issue because i can install any other package with brew without issues.

Answer 1

At the end I gave up and upgraded the OS to 10.15. Now I am able to upgrade to PHP 7.4 without problems.

Answer 2

High Sierra is not in the Homebrew support list( Homebrew 2.6 release notes ). Currently, Homebrew only supports Mojave, Catalina, Big Sur. So upgrading the macOS is a good call.