The main PHP.net website has posted a new announcement today about the release of PHP 7.0.0 RC5, the latest pre-release (Release Candidate) of the upcoming major version. This is a preview release and is not meant to be used in production.

The PHP development team announces the immediate availability of PHP 7.0.0 RC 5. This is the tenth 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 RC 5 contains fixes for 11 reported bugs and over 100 commits with various improvements.

[...] For more information on the new features and other changes, you can read the NEWS file, or the migration guide for a complete list of upgrading notes. NEWS and UPGRADING files can also be found in the release archive.

You can download this latest release to test out your applications from the QA downloads pages either for the source release or the Windows binaries. The next release planned is RC6 and will be happening on October 29th.