#46174 [Opn->Fbk]: _pcre_utt_names is overridden from libpcre.so and results in \p match failure

From: Date: Thu, 25 Sep 2008 17:20:35 +0000
Subject: #46174 [Opn->Fbk]: _pcre_utt_names is overridden from libpcre.so and results in \p match failure
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-129254@lists.php.net to get a copy of this message 
 ID:               46174
 Updated by:       nlopess@php.net
 Reported By:      pageexec at freemail dot hu
-Status:           Open
+Status:           Feedback
 Bug Type:         PCRE related
 Operating System: linux
 PHP Version:      5.2.6
 New Comment:

Please try using this CVS snapshot:

  http://snaps.php.net/php5.3-latest.tar.gz
 
For Windows (zip):
 
  http://snaps.php.net/win32/php5.3-win32-latest.zip

For Windows (installer):

  http://snaps.php.net/win32/php5.3-win32-installer-latest.msi

I believe this is fixed in latest cvs.


Previous Comments:
------------------------------------------------------------------------

[2008-09-25 16:18:02] pageexec at freemail dot hu

i guess the simple fix is to add

#define _pcre_utt_names php__pcre_utt_names

to main/php_compat.h.

------------------------------------------------------------------------

[2008-09-25 16:13:04] pageexec at freemail dot hu

Description:
------------
the pcre extension contains a copy of some specific version of libpcre,
with most of the names prefixed with php_ except for _pcre_utt_names
which is not prefixed. this means that if a libphp user such as apache2
also happens to load libpcre (mine's directly linked against it so it
loads before libphp), the symbols from the latter may override
_pcre_utt_names and libphp will use the wrong names table when analyzing
\p and \P (the indices would come from php__pcre_utt which is specific
for the _pcre_utt_names table contained in the pcre extension).

Reproduce code:
---------------
preg_match_all("/\pL/u", "php", $matches);
print_r($matches);

Expected result:
----------------
Array
(
    [0] => Array
        (
            [0] => p
            [1] => h
            [2] => p
        )

)


Actual result:
--------------
Warning: preg_match_all() [function.preg-match-all]: Compilation
failed: unknown property name after \P or \p at offset 3 in <test.php>
on line <x>


------------------------------------------------------------------------


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