I'm still not really sure what you're trying to do, but maybe bind_param_array is what you're looking for. Note this statement from the docs, though:

Note that the default implementation currently only supports non-data returning statements.

If you want to get data back from Oracle stored procedures, you need to call bind_param_inout but this method doesn't take an array as an argument. If the values you want to pass are in an array, just pass the array elements.