Run PHP71 and PHP72 on MacOS with Homebrew

Brew-php71-php72.txt

When you transition from PHP71 to PHP72, you will need check that your projects ar compataible with PHP72.

In order to do so, you need to have both PHP71 nad PHP72 installed on your machine.

To do so:
1- install your default php version, if you have not already. For me it's `brew install php71`
2- install php72 `brew isntall php72`
3- symlink php72 `ln -s /usr/local/Cellar/php@7.2/7.2.24/bin/php /usr/local/bin/php72`

And that's it.

I hope this helps.

Feedback is always welcome.