IMHO listing new functions is useful - there could be a name collision
with
a function in users code (I know it is improbable, because the functions
are
named extname_funcname, but still possible)
Improbable indeed. The nearest we ever came to that was with the Date class
(because PEAR already had a Date class - nobody else complained, mind.)
Maybe it would be best to list any new core PHP functions and mention
prefixes used by any new extensions.
The 5.2 guide lists 'new optional parameters' too. I honestly don't see how
the existence of a new optional parameter can possibly impact existing code;
ergo, it has no place in an upgrade guide.
- Steph
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