[Phpwiki-talk] Forbid too small inlines images?

[Reini U. <ru...@x-...>]

Steve Wainstead schrieb:
> Nothing new here except a higher profile for the idea...
> http://news.netcraft.com/archives/2004/06/04/wikis_the_next_frontier_for_spammers.html

I wrote now code to forbid inlined images to appear smaller than some 
size. I want to allow horizontal "one-liners", but disallow "dots".

Should a "dot size" of 6x6 be allowed or too small?

Is this reasonable?

//pseudocode in stdlib.php:LinkImage()
// check width and height as spam countermeasure
$width = $link->getAttr('width')
$height = $link->getAttr('height');
   or
$size = @getimagesize($url);
// checks images at external urls also.

             $width  = (integer) $width; // px or % or other suffix
             $height = (integer) $height;
             if (($width < 3 and $height < 10) or
                 ($height < 3 and $width < 20) or
                 ($height < 7 and $width < 7))
             {
                 trigger_error(_("Invalid image size"), E_USER_NOTICE);
                 return '';
             }


-- 
Reini Urban
http://xarch.tu-graz.ac.at/home/rurban/