Help with multi-level URL routes?

Kirby 3 Solved ✅
7

I pulled this from elsewhere on the forum:

<?php

class listing_releasesPage extends Page {
  public function url() {
    return $this->site()->url() . '/' . $this->uid();
  }
}

as a starting point and I’m getting the error:

Fatal error : Declaration of listing_releasesPage::url() must be compatible with Kirby\Cms\Page::url($options = NULL): string in ----/site/models/listing_releases.php on line 3

Could you please help me with what I’m doing wrong here? I know this example was K2, but I couldn’t find anything in the docs that talked about this in terms of Page Models. listing_releases is the the template for the child of /releases/ in the route above.

Thank you so much!