From:             ivb at is dot ua
Operating system: Windows XP
PHP version:      5.2.0
PHP Bug Type:     Strings related
Bug description:  str_replace() operates wrong on strings containing chr(0)

Description:
------------
If 'search' and 'subject' has equal length and both begins with equal
substring with chr(0) inside - str_replace() considers that 'search' and
'subject' equals.

Reproduce code:
---------------
<?php
$search =  "qx\0qqqqqqqqqq";
$subject = "qx\0xxxxxxxxxx";
$replace = "any text";

$result = str_replace ( $search, $replace, $subject );

echo $search . "\n" . $replace . "\n" . $subject . "\n" . $result . "\n";
?>

Expected result:
----------------
qx qqqqqqqqqq
any text
qx xxxxxxxxxx
qx xxxxxxxxxx

Actual result:
--------------
qx qqqqqqqqqq
any text
qx xxxxxxxxxx
any text

-- 
Edit bug report at http://bugs.php.net/?id=39621&edit=1
-- 
Try a CVS snapshot (PHP 4.4): 
http://bugs.php.net/fix.php?id=39621&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): 
http://bugs.php.net/fix.php?id=39621&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): 
http://bugs.php.net/fix.php?id=39621&r=trysnapshot60
Fixed in CVS:                 http://bugs.php.net/fix.php?id=39621&r=fixedcvs
Fixed in release:             
http://bugs.php.net/fix.php?id=39621&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=39621&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=39621&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=39621&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=39621&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=39621&r=notwrong
Not enough info:              
http://bugs.php.net/fix.php?id=39621&r=notenoughinfo
Submitted twice:              
http://bugs.php.net/fix.php?id=39621&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=39621&r=globals
PHP 3 support discontinued:   http://bugs.php.net/fix.php?id=39621&r=php3
Daylight Savings:             http://bugs.php.net/fix.php?id=39621&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=39621&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=39621&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=39621&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=39621&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=39621&r=mysqlcfg

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