If you'll remember a bit back, Matthew Weir O'Phinney shared some libraries (Phly_Struct and Phly_Config) that he'd written. Well, after some discussion with others in the community, he's changing thing up a bit.
The question is: what to name it? Hash can imply cryptographic algorithms, but, overall, is short and used often enough in PHP circles that it makes sense to me. So, I've renamed Phly_Struct to Phly_Hash, and updated Phly_Config to use the new package as its dependency.
The package and all of the instructions for it and its new functionality can be found on his channel page, you you can just upgrade/install through the "pear" command.