ID: 42424
Updated by: [EMAIL PROTECTED]
Reported By: adam-phpbugs at adam dot gs
-Status: Open
+Status: Bogus
Bug Type: PCRE related
Operating System: Any
PHP Version: 5.2.3
New Comment:
In PHP 5.2.0 two new PCRE ini options were added to prevent possible
stack overflows and crashes. One of them is pcre.backtrack_limit.
When you set it high enough your script works as it did earlier (where
no such limits existed!)
$ php -dpcre.backtrack_limit=100001 t.php
int(1)
int(1)
int(1)
int(1)
Previous Comments:
------------------------------------------------------------------------
[2007-08-25 13:16:29] adam-phpbugs at adam dot gs
Description:
------------
PHP5/PCRE will fail to match on long strings when UNGREEDY, the
boundary
is around 100k of data.
FWIW, same results if you change x* to x+ down there.
Reproduce code:
---------------
<?php
$data=sprintf("<span>%s</span>",str_repeat("x",99996));
var_dump(preg_match("#<span>(x*?)</span>#",$data));
$data=sprintf("<span>%s</span>",str_repeat("x",99997));
var_dump(preg_match("#<span>(x*?)</span>#",$data));
$data=sprintf("<span>%s</span>",str_repeat("x",99997));
var_dump(preg_match("#<span>(x*)</span>#U",$data));
$data=sprintf("<span>%s</span>",str_repeat("x",99997));
var_dump(preg_match("#<span>(x*)</span>#",$data));
?>
Expected result:
----------------
all 4 expressions should match, this is what occurs with PHP 4.4.7.
Actual result:
--------------
under PHP 5.2.3:
only the first and 4th expression match
under PHP 4.4.7:
all 4 match.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=42424&edit=1
