The PHP.net site has announced the latest releases for all current major language versions with fixes including several security-related issues:
The PHP development team announces the immediate availability of [these versions]. Six security-related issues in PHP were fixed in this release, as well as several security issues in bundled sqlite library (CVE-2015-3414, CVE-2015-3415, CVE-2015-3416). All PHP users are encouraged to upgrade to [the latest version for their current installation].
As always, you can get these latest downloads from the main downloads site or windows.php.net for the Windows binaries. Other fixes can be found in the release related list in the Changelog.