Check if URL contain the same string

I'd like to turn on my class "selected" (which is a hover basically) when I'm on the corresponding category. Pretty much the active hover thing.

Here's how I'm trying to do it:

$url = $this->getLink($menu);
    $current_url = $_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
    $selected = (strpos($url, $current_url) !== false) ? true : false;

Thing is: it's working pretty well when the URL is like: http://my-website.com/en/15-this-categorie

But it does turn on every hover when the URL is: http://my-website.com/en/ where here, none of the hover are supposed to be turned on.

Need help here!

Solution

So thanks for all your answers :D
I solved this by comparing the id, this was actually the easiest way and the most logical one

    $url = '/'.$menu['item'].'-';
    $current_url = $_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];

    $selected = (strpos($current_url, $url) !== false) ? true : false;

$menu['item'] get the category id btw