PHP 5.5.0 released.

[confguru]

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.
The key features of PHP 5.5.0 include:

• Added generators and coroutines.
• Added "finally" keyword.
• Added simplified password hashing API.
• Added support for constant array/string dereferencing.
• Added Class Name Resolution As Scalar Via "class" Keyword
• Added support for using empty() on the result of function calls and other expressions
• Added support for non-scalar Iterator keys in foreach
• Added support for list in foreach
• Added Zend Opcache extension and enable building it by default.
• The GD library has been upgraded to version 2.1 adding new functions and improve existing functionality.
• A lot more improvements and fixes

Changes that affect compatibility:

• PHP logo GUIDs have been removed
• Windows XP and 2003 support dropped
• Case insensitivity is no longer locale specific. All case insensitive matching for function, class and constant names is now performed in a locale independent manner according to ASCII rules

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.

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