The PHP development group has officially released the latest editions in the PHP 5.5.x and 5.4.x series - PHP 5.5.3 & 5.4.119:

The PHP development team announces the immediate availability of PHP 5.4.19 and PHP 5.5.3. These releases fix a bug in the patch for CVE-2013-4248 in OpenSSL module and compile failure with ZTS enabled in PHP 5.4. All PHP users are encouraged to upgrade to either PHP 5.5.3 or PHP 5.4.19.

As this is a security-related patch, all users are strongly encouraged to update their installations to prevent any potential issues. You can find out more about that flaw here. As always, you can download these latest release from the downloads page (or here for Windows binaries).