$ wget http://apt-cyg.googlecode.com/svn/trunk/apt-cyg
$ chmod +x apt-cyg
$ mv apt-cyg /usr/local/bin

apt-cyg install php -m ftp://ftp.cygwinports.org/pub/cygwinports

$ php -v
PHP 5.5.13 (cli) (built: May 30 2014 17:16:54)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2014 Zend Technologies