preg_match_all() failure on search (documentation request)

Something to get to when you get around to polishing this absurdly useful module.

I kept getting the following when I searched:

warning: preg_match_all() [function.preg-match-all]: Unknown modifier ')' in /Users/escoles/Sites/turnerengineering_staging/modules/scanner/scanner.module on line 198

I'd initially done a Replace, but come up with far fewer replacements than there should have been instances of the search string. So I searched, and this is the error that returns. I get about as many instances of this error as I think there should be instances of the search string ("/staging").

My reg exp skills are nearly nonexistant, but the line in question didn't look wrong:

$hits = preg_match_all("/(.{0,8})($search)(.{0,8})/$flag", $content, $matches, PREG_SET_ORDER);

Then it occurred to me I should be escaping the "/". Suddenly all was well.

So if you could document that in some future version, it would be marvy.

Really, this thing is frighteningly powerful. Probably should come with red blink text that says POINT AWAY FROM FACE. (I mean that as a compliment.)