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?? ??? 2000, Version 4.0.1
-- Added anonymous_function(), which gives the ability to create functions
- on-the-fly; Aliased as lambda(), for those familiar with it from other
- languages (Zeev, Zend Engine)
+- Added create_function(), which gives the ability to create functions
+ on-the-fly (Zeev, Zend Engine)
- Added support for comparisons of arrays (with arrays) and objects (with
objects) (Zeev, Zend Engine)
- Allow all functions that receive user-defined function callbacks to accept