ID: 49568
User updated by: anoop dot john at zyxware dot com
Reported By: anoop dot john at zyxware dot com
Status: Bogus
Bug Type: PCRE related
Operating System: Ubuntu Jaunty
PHP Version: 5.2.10
New Comment:
I am sorry but by adding a ? to the end of the pattern I would make the
closing brace an optional match and the regex would match the content of
the first braces till it stops matching and the content of the second
brace completely including the closing brace. But the point is to not
match the content of the first set of braces at all.
The following is the results from the suggested change. The matches
array now contain the partial match from the content of the first brace
as matches[0] and the full match from the second brace as matches[1].
This is incorrect. The contents of the first pair of braces should not
be matched at all.
array ( 0 => array ( 0 => '(Euronext, NASDAQ: CRXL;
AMEX,NYSE,NASDAQ,Swiss Exchange: CRX', 1 => 'Euronext, NASDAQ', 2 =>
'CRXL', 3 => ' AMEX,NYSE,NASDAQ,Swiss Exchange', 4 => 'CRX', ), 1 =>
array ( 0 => '(AMEX,NYSE, Swiss Exchange:CRX;Nasdaq: QTWW)', 1 =>
'AMEX,NYSE, Swiss Exchange', 2 => 'CRX', 3 => 'Nasdaq', 4 => 'QTWW', ),
)
array ( 0 => array ( 0 => '(AMEX,NYSE, Swiss Exchange:
CRX;Nasdaq:QTWW)', 1 => 'AMEX,NYSE, Swiss Exchange', 2 => 'CRX', 3 =>
'Nasdaq', 4 => 'QTWW', ), )
To put you in context. The regex does this.
Match two sets of
combinations of one of the words
from AMEX|NASDAQ|NasdaqGM|NasdaqGS|NYSE
and any number of
(words or groups of words separated by spaces)
separated by commas
paired with a stock ticker in full caps
and separted from exchange name by :
and both combinations enclosed within one brace
and separated by ;
and remember
1) Combination of exchange names of first stock
2) First stock name
3) Combination of exchange names of second stock
4) Second stock name
Previous Comments:
------------------------------------------------------------------------
[2009-09-18 18:42:41] j...@php.net
Well, it isn't a bug. Your pattern just doesn't work properly. Try
adding '?' in the end of it..
See also:
http://php.net/manual/en/regexp.reference.meta.php
------------------------------------------------------------------------
[2009-09-18 18:13:36] anoop dot john at zyxware dot com
Oh no I don't have a big issue with the bug as far as my application's
needs are concerned. The example was only a use case I tried while
testing the regex. I reported the bug (if it is indeed one) so that you
can fix it (if it is worth fixing) for everybody's sake :-)
------------------------------------------------------------------------
[2009-09-18 17:55:52] j...@php.net
How about fixing your pattern to match 1 or more times? Now it only
matches if there's exactly one match.
------------------------------------------------------------------------
[2009-09-18 14:25:52] anoop dot john at zyxware dot com
I tried taking out conditions from the regular expressions but when I
took out the first condition the expression starts giving the expected
result. So the symptom appears only for the specific expression and the
specific text.
My logic about the issue seems to be OK.
If pattern
\(P\) matches (A) returns (A) as matches array
\(P\) does not match (B)
where no part of P can match \( or \) then
\(P\) should definitely match (B)(A) and return (A) in the matches
array
------------------------------------------------------------------------
[2009-09-18 13:46:51] j...@php.net
Please, simplify the regex to as much as possible. Once you have the
simplest case still showing the problem we might be able to say whether
it's a bug or not.
------------------------------------------------------------------------
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/49568
--
Edit this bug report at http://bugs.php.net/?id=49568&edit=1
