From:
Operating system: Windows Vista
PHP version: 5.4.3
Package: PCRE related
Bug Type: Bug
Bug description:Fails when recursive group comes before reference
Description:
------------
When the recursive subpattern is captured after it is referenced:
(?2)?::(?>((?1)(?>:(?1)){0,4}):)?
It works fine. But when the capture comes before the reference it doesn't:
((?1)(?>:(?1)){0,4})?::(?>(?2):)?
The problem is the final ":" as other characters work fine. Replacing it
with "\:"
or "[:]" does not help.
Test script:
---------------
// Test 1
preg_match('/^(?>([a-f0-9]{1,4})(?>:(?1)){5}:|(?!(?:.*[a-f0-9]:){6,})(?2)?::(?>((?1)(?>:(?1)){0,4}):)?)(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(?>\.(?3)){3}$/iD',
'0:0:0:0::0:255.255.255.255');
// Test 2
preg_match('/^(?>([a-f0-9]{1,4})(?>:(?1)){5}:|(?!(?:.*[a-f0-9]:){6,})((?1)(?>:(?1)){0,4})?::(?>(?2):)?)(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(?>\.(?3)){3}$/iD',
'0:0:0:0::0:255.255.255.255');
// Test 3
preg_match('/^(?>([a-f0-9]{1,4})(?>:(?1)){5}:|(?!(?:.*[a-f0-9]:){6,})((?1)(?>:(?1)){0,4})?::(?>(?2)!)?)(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(?>\.(?3)){3}$/iD',
'0:0:0:0::0!255.255.255.255');
Expected result:
----------------
// Test 1
int(1)
// Test 2
int(1)
// Test 3
int(1)
Actual result:
--------------
// Test 1
int(1)
// Test 2
int(0)
// Test 3
int(1)
--
Edit bug report at https://bugs.php.net/bug.php?id=62041&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=62041&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=62041&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=62041&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=62041&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=62041&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=62041&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=62041&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=62041&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=62041&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=62041&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=62041&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=62041&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=62041&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=62041&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=62041&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=62041&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=62041&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=62041&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=62041&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=62041&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=62041&r=mysqlcfg
