Description:
------------
The following preg_replace breaks when the string is => 24999 characters. Works perfectly fine with 24998 characters and worked fine with any strings in PHP 5.1.5.

Reproduce code:
---------------
<?php
$string = str_repeat('a', 100000);
echo preg_replace('#(^.*|.*)(\[(php|html|noparse)\].*\[/\\3])(.*|.*$)#siUe', '', $string);
?>

Expected result:
----------------
100.000 times 'a'

Actual result:
--------------
nothing