Install PHP 7 with Homebrew:

brew install [email protected]

Symlink the formula:

brew link --force --overwrite [email protected]

Start the service:

brew services start [email protected]

Export the path if you’re using Zsh:

echo 'export PATH="/opt/homebrew/opt/[email protected]/bin:$PATH"' >> ~/.zshrc
echo 'export PATH="/opt/homebrew/opt/[email protected]/sbin:$PATH"' >> ~/.zshrc

Or export the path if you’re using Bash:

echo 'export PATH="/opt/homebrew/opt/[email protected]/bin:$PATH"' >> ~/.bashrc
echo 'export PATH="/opt/homebrew/opt/[email protected]/sbin:$PATH"' >> ~/.bashrc

See Gist: