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Bug #45488 preg_replace failed when the $subject parameter length exceeds 100009
Submitted: 2008-07-11 17:57 UTC Modified: 2008-07-12 16:06 UTC
From: webez dot cn at gmail dot com Assigned:
Status: Not a bug Package: PCRE related
PHP Version: 5.2.6 OS: *
Private report: No CVE-ID: None
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 [2008-07-11 17:57 UTC] webez dot cn at gmail dot com
if the $subject parameter's length exceeds 100009, str_replace has no return value.

This has been reproduced on windows 2003 with php 5.2.6 and Linux with php 5.2.5

If there is backslash in the $subject parameter and $pattern parameter, the critical poiont will change, the maximum string length to reproduce this bug will increase.

Reproduce code:
function str_replace_test($dummyText){
	echo "str_replace with length: ".strlen($dummyText)." ".$result."<br>";

Expected result:
str_replace with length: 100009 passed
str_replace with length: 100010 passed

Actual result:
str_replace with length: 100009 passed
str_replace with length: 100010 failed


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 [2008-07-12 16:06 UTC]
This is expected, it when fails preg_last_error() returns: int(2)

 [2010-06-25 14:02 UTC] daniel dot reiche at tu-dresden dot de
if this is intended, shouldn't the manual reflect that and e.g. state that the subject length is limited by PCRE_BACKTRACK_LIMIT ?

Just happened to stumble over this myself, and only the Bug-Report Dialog showed this bug to me after i tried to write a new one.
Was not able to find it myself using the search!
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