如何在CodeIgniter URL中的参数后引用函数？

My desired URL structure for a section of a web application is as follows:
/user/FooBar42/edit/privacy, and I would like this to route to controller: user, function: edit, with FooBar42 and privacy as arguments (in that order). How should I accomplish this with CodeIgniter?

You can also use the remapping option of the CI controller

http://ellislab.com/codeigniter/user-guide/general/controllers.html#remapping

and doing something like this:

public function _remap($method, $params = array())
{
    // check if the method exists
    if (method_exists($this, $method))
    {
        // run the method
         return call_user_func_array(array($this, $method), $params);
    }
    else
    {
     // method does not exists so you can call nay other method you want
     $this->edit($params);
    }
}

Defining this route in application/config/routes.php should work:

$route['user/(:any)/edit/(:any)'] = "user/edit/$1/$2";

However, be aware that (:any) in the above route would match multiple segments. For example, user/one/two/edit/three would call the edit function in the user controller but only pass one as the fist parameter and two as the second.

Replacing the (:any) with the regex ([a-zA-Z0-9]+) will only allow one only alphanumeric values of length at least 1. This mitigates the issue above, where a / would be permitted allowing multiple segments to be allowed. Now, if user/one/two/edit/three was used, a 404 page would be shown.

$route['user/([a-zA-Z0-9]+)/edit/([a-zA-Z0-9]+)'] = "user/edit/$1/$2";