PHP 5.5.0 Release Announcement

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[h=1]PHP 5.5.0 Release Announcement[/h]

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 the finally keyword.
  
• Added a simplified password hashing API.
  
• Added support for constant array/string dereferencing.
  
• Added scalar class name resolution via ::class.
  
• 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() constructs in foreach statements.
  
• Added the Zend OPcache extension for opcode caching.
  
• The GD library has been upgraded to version 2.1 adding new functions and improving 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, a migration guide is available detailing the changes between 5.4 and 5.5.0.

For a full list of changes in PHP 5.5.0, see the ChangeLog.

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