. virtual path handling by adding a realpath() cache. (Andi)
. variable fetches. (Andi)
. magic method invocations. (Marcus)
+- Added interface Serializeable. (Stanislav, Marcus)
+- Improved extension SPL (Marcus).
+ . added standard hierarchy of Exception classes
+ . added interface Countable
+ . added interfaces Subject and Observer
+ . added spl_autoload*() functions
+ . converted several 5.0 examples into c code
+ . added class File
- Added pg_field_type_oid() PostgreSQL function. (mauroi at digbang dot com)
- Added zend_declare_property_...() and zend_update_property_...()
API functions for bool, double and binary safe strings. (Hartmut)