From: jille at hexon dot cx
Operating system: n/a
PHP version: 5.4.7
Package: PCRE related
Bug Type: Bug
Bug description:Recursion and greedy
Description:
------------
See test-script. When I make the recursive-backreference (?R) optional
(with ?) it doesn't match $str to its full extent.
Test script:
---------------
<?php
$str = "A{X|param:{Y}}B";
$reWanted = '/{[A-Z]+(\|param:[^|}]*(?R)?[^|}]*)*}/';
var_dump(preg_match($reWanted, $str, $m), $m);
$reWorking = '/{[A-Z]+(\|param:[^|}]*(?R)[^|}]*)*}/';
var_dump(preg_match($reWorking, $str, $m), $m);
$reWorking2 = '/{[A-Z]+(\|param:([^|}]*(?R)[^|}]*|[^|}]*))*}/';
var_dump(preg_match($reWorking2, $str, $m), $m);
?>
Expected result:
----------------
For all three cases:
int(1)
array(3) {
[0]=>
string(13) "{X|param:{Y}}"
[1]=>
string(10) "|param:{Y}"
[2]=>
string(3) "{Y}"
}
Actual result:
--------------
Using $reWanted gives this instead of the expected result. Note the missing
}
int(1)
array(2) {
[0]=>
string(12) "{X|param:{Y}"
[1]=>
string(9) "|param:{Y"
}
--
Edit bug report at https://bugs.php.net/bug.php?id=63218&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=63218&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=63218&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=63218&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=63218&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=63218&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=63218&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=63218&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=63218&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=63218&r=support
Expected behavior: https://bugs.php.net/fix.php?id=63218&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=63218&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=63218&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=63218&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=63218&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=63218&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=63218&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=63218&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=63218&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=63218&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=63218&r=mysqlcfg
