Bug #72547 [NEW]: \p{Ll} fails to match accented lowercase characters.

From: Date: Tue, 05 Jul 2016 13:14:22 +0000
Subject: Bug #72547 [NEW]: \p{Ll} fails to match accented lowercase characters.
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-202067@lists.php.net to get a copy of this message 
From:             sprunka at gmail dot com
Operating system: All
PHP version:      Irrelevant
Package:          PCRE related
Bug Type:         Bug
Bug description:\p{Ll} fails to match accented lowercase characters.

Description:
------------
While testing code for matching password complexity, I noticed the
\p{Lu} matches all uppercase characters correctly, but \p{Ll} fails to
match accented characters. The German "double s" character is debatable
whether it should pass or fail. It is definitively a lowercase
character, but it has no uppercase variant. Therefore, by definition or
\p{Ll} it should not match, but all other cases I can find for it in
PCRE examples do have it match \p{Ll}. I have included it as passing as
a lower case in the "expected" results below.

Test script:
---------------
<?php
// SHOULD PASS. Passes all 5.0.5 and thereafter.
$passwordTestArray[] = 'Aa';
// SHOULD PASS. Passes all 5.0.5 and thereafter.
$passwordTestArray[] = 'Æa';
// SHOULD PASS. Fails after 5.2.10. Passes 5.0.5 - 5.2.9
$passwordTestArray[] = 'Aæ';
// SHOULD PASS. Fails after 5.2.10. Passes 5.0.5 - 5.2.9
$passwordTestArray[] = 'Ææ';
// SHOULD FAIL because ß does not have an uppercase equiv. But it
passses anyway in 5.0.5 - 5.2.9
$passwordTestArray[] = 'Aß';


// SHOULD FAIL because there is no uppercase ß.
// It fails for the wrong reasons in 5.0.5 - 5.2.9
// It passes in 5.2.10 and beyond.
$passwordTestArray[] = 'aß';


class PCREFail
{
    static public function verifyComplexity($plainTextPassword)
    {
        $re = "/(?=.*[\\p{Ll}])(?=.*[\\p{Lu}]).{2,}/";
        $found = preg_match_all($re, $plainTextPassword, $matches);
        if ($found) {
            return $matches;
        }
        return $found;
    }

}

foreach ($passwordTestArray as $passwordToTest) {
    var_dump(PCREFail::verifyComplexity($passwordToTest));
}

Expected result:
----------------
array(1) {
  [0]=>
  array(1) {
    [0]=>
    string(2) "Aa"
  }
}
array(1) {
  [0]=>
  array(1) {
    [0]=>
    string(3) "Æa"
  }
}
array(1) {
  [0]=>
  array(1) {
    [0]=>
    string(3) "Aæ"
  }
}
array(1) {
  [0]=>
  array(1) {
    [0]=>
    string(4) "Ææ"
  }
}
array(1) {
  [0]=>
  array(1) {
    [0]=>
    string(3) "Aß"
  }
}
int(0)

Actual result:
--------------
array(1) {
  [0]=>
  array(1) {
    [0]=>
    string(2) "Aa"
  }
}
array(1) {
  [0]=>
  array(1) {
    [0]=>
    string(3) "Æa"
  }
}
int(0)
int(0)
int(0)
array(1) {
  [0]=>
  array(1) {
    [0]=>
    string(3) "aß"
  }
}

-- 
Edit bug report at https://bugs.php.net/bug.php?id=72547&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=72547&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=72547&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=72547&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=72547&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=72547&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=72547&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=72547&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=72547&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=72547&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=72547&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=72547&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=72547&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=72547&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=72547&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=72547&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=72547&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=72547&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=72547&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=72547&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=72547&r=mysqlcfg

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