[RFC] Add a second argument to callback of preg_replace_callback View as Markdown

Hey:
I thought it is a minor change, so was not plan to make a RFC ..

but since there are some insistent objections, I think a RFC is better.

let's people vote for it.

here is the RFC: https://wiki.php.net/rfc/second_arg_to_preg_callback

and objections are also listed.

thanks

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Laruence Xinchen Hui
http://www.laruence.com/