Bug #51663 [Opn->Bgs]: PHP preg_match doesn't match string which should match
Edit report at http://bugs.php.net/bug.php?id=51663&edit=1
ID: 51663
Updated by: felipe@php.net
Reported by: jordi dot salvat dot i dot alabart at gmail dot com
Summary: PHP preg_match doesn't match string which should match
-Status: Open
+Status: Bogus
Type: Bug
Package: PCRE related
Operating System: Ubuntu
PHP Version: 5.3.2
New Comment:
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php
Change the pcre.backtrack_limit directive value. [1]
Tested on 5.3SVN:
<?php
printf("pcre.backtrack_limit = %d\n", ini_get('pcre.backtrack_limit'));
var_dump(preg_match("/(.+)+:/", "a:bbbbbbbbbbbbb")); // 0
var_dump(preg_last_error()); // 2 (i.e. PREG_BACKTRACK_LIMIT_ERROR)
ini_set('pcre.backtrack_limit', 1000000);
printf("pcre.backtrack_limit = %d\n", ini_get('pcre.backtrack_limit'));
var_dump(preg_match("/(.+)+:/", "a:bbbbbbbbbbbbb")); // 1
var_dump(preg_last_error()); // 0
[1] http://docs.php.net/manual/en/pcre.configuration.php
Previous Comments:
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[2010-04-28 17:48:13] jordi dot salvat dot i dot alabart at gmail dot
com
No, I didn't try it myself. A colleague (Diego Campoy) with more time
available downloaded, compiled, and tested my first steps-to-reproduce
in 5.3.2, thus confirming the bug.
Diego confirms that he tested with the bundled PCRE library, version
7.8.
------------------------------------------------------------------------
[2010-04-28 11:45:56] pajoye@php.net
Only to be sure:
did you actually try using 5.3.2 and the bundled PCRE? You can test it
without having to install PHP on your system. You only have to compile
php. The same applies for php 5.2.13.
------------------------------------------------------------------------
[2010-04-28 11:31:07] adconrad at ubuntu dot com
Given that Ubuntu builds PHP against the system libpcre, and pcretest
(by definition, but also a quick visual check with ldd) also uses the
system libpcre, it seems unlikely this is a problem with libpcre itself,
since pcretest works and PHP doesn't.
------------------------------------------------------------------------
[2010-04-26 12:18:53] johannes@php.net
Are you using the bundled PCRE lib or your system's one? - Default is
the bundled one. currently bundled is 8.02. i assume this is a PCRE
and no PHP issue.
------------------------------------------------------------------------
[2010-04-26 00:52:55] jordi dot salvat dot i dot alabart at gmail dot
com
I've been able to simplify the example to:
<?= preg_match("/(.+)+:/", "a:bbbbbbbbbbbbb") ? "pass" :
"fail" ?>
(I've checked this simplified form fails in PHP 5.2.10-2ubuntu6.4;
checking it in 5.3.2 too is left as an exercise for the reader).
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