The PHP development group has just released the latest in the PHP 5.5.x series today - PHP 5.5.17.
The PHP development team announces the immediate availability of PHP 5.5.17. Several bugs were fixed in this release. All PHP 5.5 users are encouraged to upgrade to this version.
Bugs fixed include updates in the core language, the COM extension, GD image handling, OpenSSL functionality and the SPL. You can download this latest release (source) from the main downloads page or Windows users can use windows.php.net. You can get the full list of changes and the bugs they relate to in the latest Changelog.