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Bug #37898 strip_tags selectively strips allowed_tags
Submitted: 2006-06-23 02:53 UTC Modified: 2006-07-30 01:00 UTC
Votes:2
Avg. Score:3.5 ± 0.5
Reproduced:2 of 2 (100.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: admin at rcczone dot com Assigned:
Status: No Feedback Package: Strings related
PHP Version: 4.4.2 OS: Linux / Apache
Private report: No CVE-ID: None
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 [2006-06-23 02:53 UTC] admin at rcczone dot com 
Description:
------------
For some reason beyond my knowledge, the strip_tags function is selectively stripping allowed_tags. I have tested it against three relatively similar strings (all <embed> tags) and it passing on only one out of the three. The string and xhtml tags themselves are perfectly valid, and I have no clue why strip_tags is behaving in such a way.

Reproduce code:
---------------
echo strip_tags('<embed allowScriptAccess="never"   src="http://www.picturetrail.com/photoFlick/l_bookhorizontal.swf" name="photoFlick" FlashVars="img1=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756363.jpg&img2=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756370.jpg&img3=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756373.jpg&img4=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756375.jpg&img5=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756377.jpg&img6=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756379.jpg&img7=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756381.jpg&img8=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756384.jpg&img9=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756386.jpg&img10=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756388.jpg&img11=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756391.jpg&img12=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756394.jpg&img13=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756395.jpg&img14=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756397.jpg" loop="false" menu="false" quality="high" bgcolor="..ffffff" width="600" height="410" align="middle" allowScriptAccess="never" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"></embed>','<embed>');

Expected result:
----------------
<embed allowScriptAccess="never"   src="http://www.picturetrail.com/photoFlick/l_bookhorizontal.swf" name="photoFlick" FlashVars="img1=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756363.jpg&img2=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756370.jpg&img3=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756373.jpg&img4=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756375.jpg&img5=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756377.jpg&img6=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756379.jpg&img7=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756381.jpg&img8=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756384.jpg&img9=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756386.jpg&img10=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756388.jpg&img11=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756391.jpg&img12=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756394.jpg&img13=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756395.jpg&img14=http://pic20.picturetrail.com:80/VOL1204/4617287/9809076/139756397.jpg" loop="false" menu="false" quality="high" bgcolor="..ffffff" width="600" height="410" align="middle" allowScriptAccess="never" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"></embed>

Actual result:
--------------
</embed>

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Pull Requests

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AllCommentsChangesGit/SVN commitsRelated reports
 [2006-07-22 12:15 UTC] sniper@php.net 
Please try using this CVS snapshot:

  http://snaps.php.net/php5.2-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5.2-win32-latest.zip
 [2006-07-30 01:00 UTC] php-bugs at lists dot php dot net 
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
 [2007-06-20 14:10 UTC] vorandrew+php at gmail dot com 
Code:
=================
<?php
var_dump($data['Value']);
$text = trim(strip_tags($data['Value'],'<br><a><b><strong><i><em><u>'));
var_dump($text);
?>

Result:
=================
string(218) "Cliquez &quot;TELECHARGEZ MAINTENANT&quot; pour commencer l'instalation du logiciel de Casino Las Vegas<br />
<br />
<strong>Cliquez &agrave; nouveau sur &quot;Ouvrir (Run)&quot; (ou &quot;Ouvrir- Open&quot;).</strong>"
string(103) "Cliquez &quot;TELECHARGEZ MAINTENANT&quot; pour commencer l'instalation du logiciel de Casino Las Vegas"
 [2007-06-20 14:12 UTC] vorandrew+php at gmail dot com 
Linux IGMAPPSERV 2.6.18-4-686 #1 SMP Mon Mar 26 17:17:36 UTC 2007 i686 GNU/Linux

Packages
======================
ii  libapache2-mod-php5               5.2.0-8+etch4                   server-side, HTML-embedded scripting languag
ii  php-pear                          5.2.0-8+etch4                   PEAR - PHP Extension and Application Reposit
ii  php5                              5.2.0-8+etch4                   server-side, HTML-embedded scripting languag
ii  php5-cli                          5.2.0-8+etch4                   command-line interpreter for the php5 script
ii  php5-common                       5.2.0-8+etch4                   Common files for packages built from the php
ii  php5-dev                          5.2.0-8+etch4                   Files for PHP5 module development
ii  php5-gd                           5.2.0-8+etch4                   GD module for php5
ii  php5-imagick                      0.9.11+1-4.1                    ImageMagick module for php5
ii  php5-mysql                        5.2.0-8+etch4                   MySQL module for php5
ii  php5-sqlite                       5.2.0-8+etch4                   SQLite module for php5
ii  phpmyadmin                        2.9.1.1-3                       Administrate MySQL over the WWW
 
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