The current version 3.0.1 does not support use with the newly released PHP 5.6 binaries for Windows. The new version of PHP is now compiled against VC11 instead of the previous VC10 and the code contains conflicts with the new version as documented in
This relates to
given that a new version was never released for PHP 5.5 either. Note that PHP 5.5 was released on 20 Jun 2013.