On the Zend Framework blog Matthew Weier O'Phinney has a new post covering the state of the Zend Framework project and how it relates to PHP 7.1.

When we announced Zend Framework 3 last year, one of the changes was setting the minimum supported PHP version to 5.6. Our initial plan was to support 5.6 until it reaches end-of-life, which occurs 31 December 2018.

PHP 5.6, however, stopped receiving active support almost five months ago, on 19 Jan 2017. This means that it is no longer receiving bugfixes, only critical security fixes. As such, a number of contributors have been pushing for us to up our minimum supported version to support only actively supported PHP versions, which would mean only PHP 7 versions.

[...] Our view is that the new features in PHP 7 will allow us to simplify our code dramatically, reduce bugs (primarily by increasing type safety), make our code more easily maintainable (less code required to check types; less repetitive code), provide stronger and more predictable interfaces to our users, and simultaneously provide users access to more and better language features.

He also talks briefly about their thoughts about HHVM support and if it makes sense to keep moving forward with it (given the small percentage of their user base). He then lays out a plan for the framework moving forward that includes the release of PHP 7.1+ only components and security patches on 5.6 versions until end of life.