php/php-src — pull request #679 by datibbaw (2014-05-16 08:55:50+00:00)
Title: Prevent recursion in ZF2 Parameters class

Don't call inherited `offsetGet()` when `isset()` is used, only do this for `empty()`.

Exception: when `offsetGet()` is not overridden, we can safely get the value to compare against `null` when `isset()` is used.