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Bug #61971 apply a function to an auto-referencia(preg_replace does) not produce an effect
Submitted: 2012-05-07 21:07 UTC Modified: 2012-05-07 22:05 UTC
From: yoyahack at undersecurity dot net Assigned:
Status: Not a bug Package: Output Control
PHP Version: 5.4Git-2012-05-07 (Git) OS: Linux Debian
Private report: No CVE-ID: None
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 [2012-05-07 21:07 UTC] yoyahack at undersecurity dot net 
Description:
------------
when  applies a function to a auto-reference (preg_replace),  it not affect to the auto-referente

Test script:
---------------
<?php

echo preg_replace('/<!\[CDATA\[([\w\W]+?)\]\]>/i', htmlentities('$1'), '<category><![CDATA[Examp<b>l<a>e]]></category>');

?>

Expected result:
----------------
<category>Examp&lt;b&gt;l&lt;a&gt;e</category>

Actual result:
--------------
<category>Examp<b>l<a>e</category>

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 [2012-05-07 22:05 UTC] nikic@php.net 
Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions.  Due to the volume
of reports we can not explain in detail here why your report is not
a bug.  The support channels will be able to provide an explanation
for you.

Thank you for your interest in PHP.

The htmlentities() is executed before passing the result to preg_replace(). So in the end you just pass '$1' on.

What you probably want to use is http://de3.php.net/manual/en/function.preg-replace-callback.php.
 [2012-05-07 22:05 UTC] nikic@php.net
-Status: Open +Status: Not a bug
 
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