The PHP project has officially released the latest version in the 5.4.x series of the language - PHP 5.4.17, a bugfix release:

The PHP development team announces the immediate availability of PHP 5.4.17. About 20 bugs were fixed. All users of PHP are encouraged to upgrade to this release. For source downloads of PHP 5.4.17 please visit our downloads page, Windows binaries can be found on windows.php.net/download/. The list of changes is recorded in the ChangeLog.

Fixes include changes to correct a few segfaults, an update to DateTime, corrections to PDO and some of the drivers as well as Readline and SPL (RecursiveIteratorIterator).