Login Redirect Based on Roles

gistfile1.php

function my_login_redirect($redirect_to, $request){
    global $user;
    get_currentuserinfo();
  
    //is there a user to check?
    if(is_array($user->roles))
    {
        //check for admins
        if(in_array("administrator", $user->roles))
            return home_url("/wp-admin/");
        elseif
            (in_array("subscriber", $user->roles))
			return home_url("author/" .$user->user_login);
		else
			return home_url();
	}
}
add_filter("login_redirect", "my_login_redirect", 10, 3);