The PHP development group has released the latest Release Candidate for the PHP 5.5 series - Release Candidate 3. This is a development preview, so it's not to be used in production but all testing is appreciated.
To get the full changelog, please, check the NEWS file attached to the archive. For source downloads of PHP 5.5.0RC3 please visit the download page, Windows binaries can be found on windows.php.net/qa/. We were pleased if you could test this release candidate against your code base and report any problems that you encounter to the QA mailing list and/or the PHP bug tracker. Thanks you helping us making PHP better.
Bugs fixed in this release include issues causing segfaults, buffer overflows and truncation of data when hashing with hash_pbkdf2.`