How can I let zend accept any parameters?

[email protected] (Aaron Lewis)
Newsgroups php.internals
Message-ID <CAJZVxRkkNfnnD_vP=HWHLyFtfWzJ_HNNDV3373xwTvvB19nFjA@mail.gmail.com> 
What should I use in "zend_parse_parameters" so that it can support
arguments like this:

1. object, string
2. null, string

I'm not sure what represents "null" here

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