::Exception, because the class resolution order seems to look like this:
- does the class exist (_already defined_) in the current namespace?
- does the class exist in the global (non-prefixed or "::") namespace?
- then try autoload
That's exactly how it works, with the amendment that only internal
classes are considered on step 2.
What I think should happen is:
- does the class exist in the current namespace?
- can the class be autoloaded with the current namespace?
- does the class exist in the global scope
- global autoload
If it worked this way, you couldn't easily use global classes and old
applications would be much harder to convert to namespaces. We think
that using global Exception is much more frequent than defining your own
Exception - and in the latter case you have the choice to name it
something that is not the same as existing class, while in the latter
case you do not. So we decided to make resolution rules so that it makes
easier to work with the most frequent case and makes easier to work with
existing code.
The other alternative would be to say that if you want to use a global
class inside a namespace you MUST prefix it with ::. I think this is
We consider it not the best choice. Using of global classes is
ubiquitous in current applications, always requiring :: would make it
very hard to convert them to namespaced code. We think it would require
much more work than just having "require_once" in places when you
override the internal classes.
reasonable since if you have a namespaced file it's already not going to
work with anything before PHP 5.3, and that would remove the two
The problem is not working with PHP before 5.3, the problem is using
code that was written before 5.3. We try to make this code as easy as
possible to upgrade, and it seems that blocking access to internal
classes would not do us much good.
--
Stanislav Malyshev, Zend Software Architect
[EMAIL PROTECTED] http://www.zend.com/
(408)253-8829 MSN: [EMAIL PROTECTED]
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