Relative namespaces and call_user_func()

Question

Code speaks better than words:

namespaces.php:

Answer 1

You have to use the fully qualified classname in callbacks.

See Example #3 call_user_func() using namespace name

I believe this is because call_user_func is a function from the global scope, executing the callback from the global scope as well. In any case, see first sentence.

Also see the note aboveExample #2 Dynamically accessing namespaced elements which states

One must use the fully qualified name (class name with namespace prefix).