Jeffrey Sambells wrote:
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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Get Mozilla Firefox at
http://spreadfirefox.com
If I'm understanding what you want, consider this. I use it to check matching tags.
First get an array of all the start tags:
$pattern= "%<([^/][a-z_\-]*)>%i"; //all start tags used <xxx>
preg_match_all("$pattern", $text_str, $matches);
$start_tags= $matches[1];
$start_tag_nums= array_count_values($start_tags); //get count for each tag
Then do the same for your end tags, using the same pattern but with the end tag slash. </....
Finally, you make a text list of the mismatches:
foreach($start_tag_nums as $tag=> $num){
if($num != $end_tag_nums[$tag]) $end_error_msg .= "<$tag> || ";
}//end foreach
echo $end_error_msg;
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