The PHP.net site has announce the release of the latest beta version of the next upcoming major release of the language - PHP 7.0.0 Beta 3
The PHP development team announces the immediate availability of PHP 7.0.0 Beta 3. This is the fifth pre-release of the new PHP 7 major series. All users of PHP are encouraged to test this version carefully, and report any bugs and incompatibilities in the bug tracking system. [...] PHP 7.0.0 Beta 3 contains fixes for 33 reported bugs, 11 of which are security related, and altogether over 200 commits with various improvements.
You can download the source this latest beta from the php.net downloads section or the Windows binaries on windows.php.net/qa. The next release will be Release Candidate 1 on the 20th of August so the stable release will be coming soon! You can check out the NEWS file for what to expect in PHP 7 too.