The main PHP.net site has announced the release of the latest minor version in the PHP 5.6.x series: PHP 5.6.16:

The PHP development team announces the immediate availability of PHP 5.6.16. Several bugs have been fixed. All PHP 5.6 users are encouraged to upgrade to this version.

Changes in this release include updates to Mysqlnd, PDO and OCI8 bugfixes as well as changes in the SPL (ArrayObject) and a segfault with the ini_lex function. You can get this latest release as always from either the main download page (source) or from the Windows.php.net site (Windows binaries).