This has been asked on here (over a year ago), but apparently not answered, and WordPress is always evolving so maybe theres a good solution now. I want to pass variables to a WordPress page via the url (similar to CodeIgniter uri helper segments).

Currently I can do this...

My profile page is: http://website.com/profile

I can pass a variable like this: http://website.com/profile?username=johndoe

I want to pass the variable in like this: http://website.com/profile/johndoe

There has to be some sort of helper function, right?