The long awaited release of PHP 5.5 has finally happened - 5.5.0 has been made available via the PHP.net site (and mirrors).
The PHP development team is proud to announce the immediate availability of PHP 5.5.0. This release includes a large number of new features and bug fixes. [...] For users upgrading from PHP 5.4 there is a migration guide available here, detailing the changes between PHP 5.4 and PHP 5.5.0. For a full list of changes in PHP 5.5.0, see the ChangeLog.
There's a long list of new features that comes with this release as well including generators, "finally", class resolution via "class" keyword, support for list in foreach and the enabling of the Zend Opcode caching by default. You can download this release now from PHP.net.