need a find/replace command to fix my require_once

I was reading this: http://pear.php.net/manual/en/standards.including.php and it states: "Note: include_once and require_once are statements, not functions. Parentheses should not surround the subject filename." I never knew that. I've always (wrongly) used: require_once('/path/to/my/file'); Anyone have a bash command line snippet (or other code is fine too I guess) that will fix all my directory tree? The tricks are that I think there can be several variations and several instances with a given file too: require_once('/path/to/my/file'); require_once ('/path/to/my/file'); require_once("/path/to/my/file"); require_once(ROOTPATH."/my/file"); etc. Note the space before the parens, the single vs. double quotes and the use of a global define. I think this regex should work: require_once\s?\((.*?)\); I just don't know the magic sed/awk/grep/whatever to do the search and replace on all my .php files recursively. This seems like a useful 'routine' to post up on that page, as I'm sure I'm not the only one who didn't know this little subtlety (considering PHP doesn't puke on it either).