On June 23rd 2016, the PHP group released PHP 5.6.23.
Several bugs were fixed in this release, including security-related ones. All PHP 5.6 users are encouraged to upgrade to this version.
PHP 5.6.23 packages are now available for Debian 7 “Wheezy”, on both amd64 and i386 architectures, in ZTS and non-ZTS (default) flavors, along with the usual PECL extensions.