Hi Greg,
1) recommend all global non-namespaced code that wishes to import namespaced code via "use Namespace::Classname" add a "namespace __php__;" at the top of the file, and that the __php__ namespace be reserved for use by end-user applications.
That answers my main concern, but I'd make it stronger than a recommendation. I'd make it impossible to import namespaced code into the global space.
- Steph
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