Should I namespace global functions in PHP?

Question

In PHP, I\'m using namespaces at the class level. However, Netbeans keeps telling me namespace my global functions as well. For example, if I type

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Answer 1

Overzealous for sure, but I can't reproduce this is Netbeans 7.0.1, with PHP Plugin 1.17.1. It's not the convention, anyway, and I would not consider it a best practice at all.