From: Arne dot Heizmann at csr dot com
Operating system: All
PHP version: 5.2.6
PHP Bug Type: Regexps related
Bug description: preg_match_all() misses elements (corner-case)
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 bug report at http://bugs.php.net/?id=45366&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=45366&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=45366&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=45366&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=45366&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=45366&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=45366&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=45366&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=45366&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=45366&r=support
Expected behavior: http://bugs.php.net/fix.php?id=45366&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=45366&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=45366&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=45366&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45366&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=45366&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=45366&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=45366&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=45366&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=45366&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=45366&r=mysqlcfg
