Something like this: http://www.nosq.com/blog/2006/01/runphp-plugin-for-wordpress/ ? It allows the use and running of PHP-code inside the text on pages, and post - can be turned on/off for individual postings.
I was also searching about that, but while I'm using joomla, I can't find how to use php script, can you please help me on that ?
I don't use Joomla, so I don't know it, but maybe this can help: http://www.kksou.com/php-gtk2/Joomla/DirectPHP-plugin.php
they offer plugs-ins to allow this. i use "exec-php" it allows you to use php in your post, pages and the text widget =] the cool thing about it is it does not make you use special tags or anything. just raw php =]