From: harrrrpo at gmail dot com
Operating system: Windows
PHP version: 5.3.1
PHP Bug Type: PCRE related
Bug description: preg_match , last optional sub-patterns ignored when empy
Description:
------------
in preg_match , when optional sub-patterns (using ? or {0,n} ) are the
last sub-patterns and empty (e.g. not matched) they are ignored in $matches
array
this behavior is inconsistent with preg_match_all , and with the case when
the empty optional sub-pattern isn't the last one
Reproduce code:
---------------
$str="1";
preg_match("#\d(\d)?#",$str,$mt);
var_dump($mt);
Expected result:
----------------
array(2) {
[0]=>
string(1) "1"
[1]=>
string(0) ""
}
(the string(0) "" does appear on all cases with preg_match_all , and with
preg_match , when there is any additional sub-patterns after it)
Actual result:
--------------
array(1) {
[0]=>
string(1) "1"
}
(the value of sub-pattern vanished)
--
Edit bug report at http://bugs.php.net/?id=50887&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=50887&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=50887&r=trysnapshot53
Try a snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=50887&r=trysnapshot60
Fixed in SVN:
http://bugs.php.net/fix.php?id=50887&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=50887&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=50887&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=50887&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=50887&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=50887&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=50887&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=50887&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=50887&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=50887&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=50887&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=50887&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=50887&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=50887&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=50887&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=50887&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=50887&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=50887&r=mysqlcfg
