Dynamic PHP Execution

I'm having a problem where I pull text from my DB. The text has html and php tags in it, nothing unusual.
So the issue is, I can't execute the PHP pulled from the DB.
What it boils down to is that a variable $content has the PHP in it and when I echo $content it doesn't run the PHP.
I can't find anything on the net or php.net about executing dynamicly (sp?) created PHP code, which I think is analagous to this situation. Maybe my google-fu is not strong enough. Anyway, if anyone has handled this kind of thing before I would appreciate the help.

www.velvetcache.org <- View source and search for a php tag to see what I mean.

Thanks,
John

What you're looking for is eval().

Ah! Thanks, don't know how I missed that one but I owe you.