I have created one application for my portfolio.
Let’s say the URL is http://fb.domain.com/about/ and my FB app is http://apps.facebook.com/myap/about/.
A user can access http://fb.domain.com/about/ directly from my site.
If the user types http://fb.domain.com/about/ or clicks http://fb.domain.com/about/, how do I redirect them to http://apps.facebook.com/myapp/about/
Here’s an example from http://www.oodle.com.
If you go to this link, you will be redirected to here.
How is that done? Let me know. I currently use php for my site.
You can use ModRewrite in your .htaccess to redirect based on the rules set, which is probably the cleanest solution without involving hardcoding redirects in your code.