RegEx pattern to match a string between two characters, but exclude the characters

Greetings all,

I have yet another RegEx question. I have done hours of searching but apparently I have missed the one key article I need.

I need to use preg_match() in PHP to match a string that is between parenthesis, but NOT have the parenthesis show up in the result. I have seen examples of similar issues, but I believe my problem is different because it's actually parenthesis that I am dealing with, with is a meta character in RegEx. Any merit to that?

Anyways...

String is:

     "200 result=1 (SIP/100-00000033)"

Current code is:

preg_match("/\((.*)\)/s", $res, $matches);

$matches[0] becomes:

     "(SIP/100-00000033)"

What I WANT is:

     "SIP/100-00000033"

I apologize because I'm sure thi开发者_JS百科s is VERY simple but I'm just not grasping it. Would anyone care to educate me?

Thank you in advance!!

Well, it all refers to the way you group items in the regular expression. Your solution is actually correct, you're just using the wrong index for matches. Try:

$matches[1]

If that somehow gives errors, post'em and we'll fix.

If you really want the full match to exclude the parentheses, you can use look-ahead and look-behind assertions:

preg_match('/(?<=\().*(?=\))/s', $res, $matches);