Get PHP Installed -- Laracasts Vid
Note to self: If ever making composer calls outside of Homestead VM for installing a Laravel version in development (Laravel 5.3 as of 6/30/16), make sure the PHP version on your local machine is current or the same as the VM. Otherwise, composer will fail if the PHP version requirement is greater than what's on your local.
To update, run:
$ brew install homebrew/php/php70
PHP 7.0 is the current verion as of 6/30/16
Make sure to open new terminal window and can check the update:
$ php -v