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Bug #52500 Using array_map, strip tags & nested $_POST array
Submitted: 2010-07-30 15:33 UTC Modified: 2010-07-31 18:17 UTC
From: jason dot gerfen at gmail dot com Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 5.2.14 OS: Ubuntu 10
Private report: No CVE-ID: None
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From: jason dot gerfen at gmail dot com
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 [2010-07-30 15:33 UTC] jason dot gerfen at gmail dot com 
Description:
------------
When using a combination of array_map() & strip_tags to create a localized copy of the $_POST superglobal array I am experiencing problems if $_POST contains a nested array.

It seems to discard any secondary iteration of said nested array.

Test script:
---------------
$_POST = array('level-1-1', $var1,
               'level-1-2', $var2,
               'level-1-3', $var3,
               'level-1-4', array('level-2-1', $var1,
                                  'level-2-2', $var2,
                                  'level-2-3', $var3),
               'level-1-5', $var5);

$post = array_map(strip_tags, $_POST);

echo '<pre>'; print_r($post); echo '</pre>';

/* I am left with this?
level-1-1 => $var1
level-1-2 => $var2
level-1-3 => $var3
level-1-5 => $var5
*/

Expected result:
----------------
I expected a complete copy of the nested superglobal $_POST.

Actual result:
--------------
Any nested array information is getting stripped out.

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 [2010-07-31 10:59 UTC] johannes@php.net
-Status: Open +Status: Bogus
 [2010-07-31 10:59 UTC] johannes@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

this call strip_tags in a way similar to this:


strip_tags(array('level-2-1', $var1,
                                  'level-2-2', $var2,
                                  'level-2-3', $var3));

which gives an unexpected result.

what you need is wrapper handling the recusrion similar to

function strip_tags_recursive($data) {
     if (is_array($data)) {
         return array_map('strip_tags_recursive', $data);
     } else {
         return strip_tags($data);
     }
}

$myget = strip_tags_recursive($_GET);

While all this isuntested but shouldgive you the idea.
 [2010-07-31 18:17 UTC] jason dot gerfen at gmail dot com 
Thanks. I suppose I thought array_map should work recursively.
 
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