MDI HTTP Referer Block lets site owners mark visitors that arrive from specified referrer domains and optionally:
- Show a small notification (server-side) with the referrer host/path.
- Hide specific elements (CSS selector).
- Redirect flagged visitors to a different URL.
- Use server-side referrer detection (PHP) and/or client-side detection (JS) for cases where referrer headers are missing.
Cookies used: mdi_syndicated_ref — the plugin sets this cookie for the configured number of days.
