Sara Golemon c74bc87c74 Minor optimizations to array_keys()/array_values() ...

array_values():
When the input is an empty array or a packed array with no gaps,
return the original array.

array_keys():
When the input is an empty array, return the original array.
When the input is a packed array with no holes
(and no search key specified), populate the return with
a simple range(0, count($input) - 1)

2017-03-14 11:23:02 -07:00

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