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Bug #55174 htmlspecialchars buggy
Submitted: 2011-07-11 07:05 UTC Modified: 2011-07-12 03:16 UTC
From: development at dayside dot net Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 5.4.0alpha1 OS: winxp sp3
Private report: No CVE-ID: None
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From: development at dayside dot net
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 [2011-07-11 07:05 UTC] development at dayside dot net
when any string contains any char of these -> äöüß 
and the string is processed with htmlspecialchars it results in an empty string...

Test script:

echo htmlspecialchars('Test123 äöüß');


Actual result:


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 [2011-07-11 10:16 UTC]
-Status: Open +Status: Bogus
 [2011-07-11 10:16 UTC]
The default encoding as of PHP 5.4 is UTF-8 (it was ISO-8859-1 before). Therefore, if your string is in ISO-8859-1, you must specify the encoding.

Closing as bogus.
 [2011-07-11 12:34 UTC]
You can also set your default_charset back to iso-8859-1 in your php.ini file, but really these days you should be using utf-8.
 [2011-07-12 01:26 UTC] development at dayside dot net
correct me if i'm wrong, but this function returns nothin' in case of 'Test123'
and thats okay ? 
...and not everyone is allowed to change that php.ini setting

in some cases as a user you dont know which encoding is used... 
in such a case htmlspecialchars discards all data... thats a fantastic idea..
 [2011-07-12 03:16 UTC]
That's the only safe approach. If you don't know the encoding of the characters, you can't possibly know that they are safe to output since they aren't valid in your current encoding. Trying to clean up a string full of invalid characters is dangerous. The only safe approach is to not allow them.

As for not being allowed to change your php.ini, that's fine, that's why the htmlspecialchars() call takes an optional encoding argument.
 [2013-05-07 20:18 UTC] new dot false dot email at gmail dot com
try this, it worked for me:

htmlspecialchars('Test123 äöüß', ENT_QUOTES | ENT_HTML401, '');
this is the important part --------------------------------^
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