[Pmwiki-users] calculating directives ?

[Patrick R. Michaud]

On Wed, Jun 16, 2004 at 10:09:41PM +0200, Knut Alboldt wrote:
> I like PmWiki as a allround publishing tool. I even experiment at my 
> "home"-wiki to use it to hold addresses and writing letters :-)
> 
> I thought of writing a cookbook-recipe to implement pmwiki-directives to do 
> inline calculations e.g.
> 
> I thought of evaluating php-functions for the expressions and assignments 
> maybe added by some user-written php-functions

Keep in mind that evaluating arbitrary php functions using eval()
is a Very Bad Thing if you're allowing other authors to edit pages.  
For example, you probably don't want to let someone eval a string like 

   0+3*system('rm -rf wiki.d')

Continuing on, "user-written php functions"  (where "user" means "author") 
is likely a Very Very Bad Idea -- you're basically giving authors 
the ability to execute arbitrary scripts on your server.  

Pm