ID: 44463
User updated by: php at sameprecision dot org
Reported By: php at sameprecision dot org
Status: Bogus
Bug Type: PCRE related
Operating System: irrelevant
PHP Version: 5.2.5
New Comment:
Why would you expect three matches for a,a ?
Previous Comments:
------------------------------------------------------------------------
[2008-03-17 22:41:00] [EMAIL PROTECTED]
This result is expected.
Using pcretest:
PCRE version 7.5-RC2 2007-12-27
re> /(a|)(,|$)/g
data> a,
0: a,
1: a
2: ,
0:
1:
2:
data> a,a
0: a,
1: a
2: ,
0: a
1: a
2:
0:
1:
2:
Thanks.
------------------------------------------------------------------------
[2008-03-17 22:13:54] php at sameprecision dot org
Description:
------------
Performing a global match with empty alternative in subpattern followed
by $ alternative in subpattern results in "extra" match.
In the example below, I believe that preg_match_all should match the
second 'a' in the first subpattern, match the end of subject assertion
in the second subpattern and flag the global search as over.
I've tried this with php5.2.5/pcre7.3 on linux.
Reproduce code:
---------------
$regex = '/(a|)(,|$)/';
echo preg_match_all($regex, 'a,', $m1, PREG_SET_ORDER)."\n";
print_r($m1);
echo preg_match_all($regex, 'a,a' ,$m2, PREG_SET_ORDER)."\n";
print_r($m2);
Expected result:
----------------
2
Array
(
[0] => Array
(
[0] => a,
[1] => a
[2] => ,
)
[1] => Array
(
[0] =>
[1] =>
[2] =>
)
)
2
Array
(
[0] => Array
(
[0] => a,
[1] => a
[2] => ,
)
[1] => Array
(
[0] => a
[1] => a
[2] =>
)
)
Actual result:
--------------
2
Array
(
[0] => Array
(
[0] => a,
[1] => a
[2] => ,
)
[1] => Array
(
[0] =>
[1] =>
[2] =>
)
)
3
Array
(
[0] => Array
(
[0] => a,
[1] => a
[2] => ,
)
[1] => Array
(
[0] => a
[1] => a
[2] =>
)
[2] => Array
(
[0] =>
[1] =>
[2] =>
)
)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=44463&edit=1
