brew install php-version
source $(brew --prefix php-version)/php-version.sh && php-version 7
example:
localhost:~ Ken$ php-version
5.5.30
* 5.6.17
7.0.2
localhost:~ Ken$ php-version 7.0.2
localhost:~ Ken$ php -v
PHP 7.0.2 (cli) (built: Jan 7 2016 10:40:26) ( NTS )
Copyright (c) 1997-2015 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2015 Zend Technologies
localhost:~ Ken$