The PHP Community releases the next batch of version updates: PHP 5.6.6, PHP 5.5.22 and PHP 5.4.38. These versions are now available for all 1&1 customers.
In addition to the usual bug fixes and improvements, the new versions include some important security updates.
Also included in PHP 5.6.6: a fix for the vulnerability reported by Stefan Esser in the unserialize() function (CVE-2015-0231) since PHP 5.6.5.
Automatic version updates by 1&1: We are automatically performing version updates for the current PHP versions – this means you always benefit from the improvements that come along with the version updates.
Your PHP settings in the 1&1 Control Panel.
Download and changelog: The current PHP versions and the complete changelog are available on php.net.