From:
Operating system: Ubuntu 10.10
PHP version: 5.3.5
Package: Scripting Engine problem
Bug Type: Bug
Bug description:incorrect result preg_replace with large strings
Description:
------------
While converting phpBB code to html, preg_replace return empty string.
Test case:
<?php
$str = '[b]';
// Please try run this test case also with $i<99997 and compare result's
for ($i=0; $i<99998; $i++) $str .= 'q';
$str = preg_replace("#\[b\](.+?)\[\/b\]#is", "[p]", $str);
echo $str;
?>
I know about pcre.backtrack_limit, but i think in this case PCRE must
generate
exception with fatal error.
Test script:
---------------
<?php
$str = '[b]';
// Please try run this test case also with $i<99997 and compare result's
for ($i=0; $i<99998; $i++) $str .= 'q';
$str = preg_replace("#\[b\](.+?)\[\/b\]#is", "[p]", $str);
echo $str;
?>
Expected result:
----------------
Return non empty string or generate exception with fatal error
Actual result:
--------------
Empty string
--
Edit bug report at http://bugs.php.net/bug.php?id=53825&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=53825&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=53825&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=53825&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=53825&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=53825&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=53825&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=53825&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=53825&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=53825&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=53825&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=53825&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=53825&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=53825&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=53825&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53825&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=53825&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=53825&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=53825&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=53825&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=53825&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=53825&r=mysqlcfg
