Regex for balanced brackets?

[Jeffrey Sambells <jeff@xxxxxxxxxxxx>]

I came across this method of matching brackets with regex in .NET

http://puzzleware.net/blogs/archive/2005/08/13/22.aspx

but I am wondering if it is possible to do the same in PHP?

I've tried it a bit but I can't seem to get it to work properly. I'm  
just wondering if I am doing something wrong or if it is just not  
possible.

Thanks.

here is the code I was playing with:

<?php

$pattern = <<<PATTERN
\{
	(?>
		[^{}]+
		|
		\{ (?P<DEPTH>)
		|
		\} (?P<-DEPTH>)
	)*
	(?(DEPTH)(?!))

\}
PATTERN;

$subject = <<<SUBJECT
test {
	test2 {
		test3
	}
}

test4
{

}
SUBJECT;


preg_match_all("/$pattern/ix",$subject,$matches);

header("content-type: text/plain; ");

var_dump($matches);

?>


- Jeff



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jeffrey Sambells
Director of Research and Development
Zend Certified Engineer (ZCE)

We-Create Inc.
jeff@xxxxxxxxxxxx email
519.745.7374 office
519.897.2552 mobile

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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