#45366 [Opn->Ver]: preg_match_all() misses elements (corner-case)
| From: | felipe@php.net | Date: | Wed, 02 Jul 2008 02:48:52 +0000 |
| Subject: | #45366 [Opn->Ver]: preg_match_all() misses elements (corner-case) | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-126172@lists.php.net to get a copy of this message | ||
ID: 45366
Updated by: felipe@php.net
Reported By: Arne dot Heizmann at csr dot com
-Status: Open
+Status: Verified
Bug Type: PCRE related
Operating System: *
PHP Version: 5.2.6
New Comment:
I can reproduce.
PS: The example works fine on pcretest (PCRE version 7.6).
Previous Comments:
------------------------------------------------------------------------
[2008-06-26 13:37:36] Arne dot Heizmann at csr dot com
Description:
------------
The following example code demonstrates that preg_match_all() does not
always return all elements as it should.
Almost any change to the input string makes the bug no longer trigger.
For example, remove one of the B's, and the bug no longer occurs. Same
goes for the regexp: if you change the (?=X|Y) to (?=X) or anything
simpler, the bug no longer triggers.
Reproduce code:
---------------
<?
header ('Content-type: text/plain');
$input = 'A, BBBBBBBB abcd abcd\'y';
preg_match_all ("/[AB]+(?:\\s*\\w+)*(?=X|Y)|./si", $input,
$output);
var_export ($output);
?>
Expected result:
----------------
array (
0 =>
array (
0 => 'A',
1 => ',',
2 => ' ',
3 => 'B',
4 => 'B',
5 => 'B',
6 => 'B',
7 => 'B',
8 => 'B',
9 => 'B',
10 => 'B',
11 => ' ',
12 => 'a',
13 => 'b',
14 => 'c',
15 => 'd',
16 => ' ',
17 => 'a',
18 => 'b',
19 => 'c',
20 => 'd',
21 => '\'',
22 => 'y',
),
)
Actual result:
--------------
array (
0 =>
array (
0 => 'A',
1 => ',',
2 => ' ',
),
)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=45366&edit=1