Should I use Controller Argument or uri->segment?

Question

Should use Controller Argument

function view($post_id) {
    ...
}

or uri->segment

function view() {
    ...
    $post_id = $this->uri->segment(3);
    ...
}

Just for simple blog post ID. Is there a difference?

Answer 1

I would use the controller argument.

Then if you ever had to move the code and put it in a sub-directory it would still work, where as the segment method would not.