Regex for balanced brackets?
| From: | Jeffrey Sambells | Date: | Mon, 21 Nov 2005 19:42:46 +0000 |
| Subject: | Regex for balanced brackets? | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-226237@lists.php.net to get a copy of this message | ||
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@wecreate.com email
519.745.7374 office
519.897.2552 mobile
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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