Hi,
PHP 5.6.0 will be soon in "beta" stage.
(5.6.0alpha3 is available and should be the last alpha)
So I start working on PHP 5.6 packaging.
For those interested, for now, this happens in my personal repository
(remi-dev).
Fedora 20:
http://rpms.famillecollet.com/fedora/20/devs/x86_64/repoview/
Fedora 19:
http://rpms.famillecollet.com/fedora/19/devs/x86_64/repoview/
For now, 5.6.0 final is planed for June.
So should be possible for Fedora 21 (change proposal not yet submitted)
I will try to build most extensions to check is eveything is ok.
If you have some libraries, with test suite, or some webapps, I
encourage you to test again this new version (upgrade should be smooth).
Remi.