Узнать версию php в терминале

php -v

результат: PHP 5.3.27 (cli) (built: Dec 16 2013 07:00:49)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2013 Zend Technologies
    with eAccelerator v1.0-dev, Copyright (c) 2004-2012 eAccelerator, by eAccelerator
    with the ionCube PHP Loader v4.4.4, Copyright (c) 2002-2013, by ionCube Ltd., and
    with Zend Guard Loader v3.3, Copyright (c) 1998-2010, by Zend Technologies