[pmwiki-users] pmwiki content not visible after Debian upgrade

Petko Yotov 5ko at 5ko.fr
Tue May 17 16:44:31 CDT 2016

What you describe is often caused by a change in PHP 5.4 which affects 
the function htmlspecialchars().

The easiest temporary fix would be in your php.ini, or in .user.ini to 
change the default_charset directive to an 8-bit charset, for example 

   default_charset = "Windows-1252"

Or, this may sometimes work in pmwiki/local/config.php:

   ini_set("default_charset", "Windows-1252");

A more permanent fix would be to upgrade your installation to a more 
recent PmWiki version, your recipes, and to check if your own recipes or 
modules use htmlspecialchars() and replace these calls with PHSC(), a 
PmWiki helper function for such cases.

The "blank" pages come from the fact that in PHP 5.4 the default 
encoding switched from an 8-bit encoding to variable-bit validated 
UTF-8, and that an incorrect UTF-8 string will be rejected. If your wiki 
uses an 8-bit encoding, it is virtually certain that it is not valid 
UTF-8. Worse, even if you do use UTF-8 some browsers may submit invalid 
bits. So the PHSC() function always pretends that it converts an 8-bit 
encoding where all bits are allowed.


Change log     :  http://www.pmwiki.org/wiki/PmWiki/ChangeLog
Release notes  :  http://www.pmwiki.org/wiki/PmWiki/ReleaseNotes
If you upgrade :  http://www.pmwiki.org/wiki/PmWiki/Upgrades

On 2016-05-17 23:04, Reiner Bühl wrote:
> I have upgraded my system from Debian Squeeze to Wheezy and now I
> can't see the content of my pmwiki anymore. The files in wiki.d are
> still there and also some links on the sidebar are shown, but in the
> main area of the page, I only see the title of the Homepage but no
> page content.
> I assume that the upgrade did something to the apache2 php.ini, but I
> am not sure what is missing or wrong there. In the apache error log I
> couldn't see any error messages.
> Where should I start searching?

More information about the pmwiki-users mailing list