In the week of May 27th 2024, Extiverse will be merged into one unified platform: Read more

Canonical Url

Create redirects to the canonical url of your forum

Compatible with Flarum v1.8.5

Latest release 1.0.0


released on Mar 13, 2019


Canonical Url extension by MigrateToFlarum

MIT license Latest Stable Version Total Downloads Donate

This extensions creates redirects so that Flarum can only be accessed via the url defined in config.php.

First note: your host might already be doing those redirects for you. If that's the case, then you don't need this extension.

Second note: if your host supports configuring redirects (via Apache Rewrites or Nginx server rules for example), I recommend using that instead of an extension for better performance. If those features are not available or if you don't have the technical knowledge to use them, then this extension is for you!

Third note: this extension does not work with Flarum installs in subfolders.


composer require migratetoflarum/canonical


composer require migratetoflarum/canonical
php flarum cache:clear


To enable the redirects, first enable the extension in your Flarum dashboard. Then access the extension settings and select a redirect status.

The extension settings will only be available when you access the forum via the canonical url. This should prevent you from getting locked outside of the forum if Flarum cannot actually be reached via the url defined in config.php.

Before continuing, you should make sure the url value in config.php is the URL you want as canonical. In particular if HTTPS is enabled on your host (as it should), make sure the canonical url includes https://.

You should first enable the temporary redirect option, so you can test the redirects without them being cached in every browser and search engine browsing the forum. If your forum uses a bare domain (no www. subdomain), try accessing the www. subdomain and you should be redirected with a 302 status. If your forum uses a www. subdomains, try accessing the bare domain (without www.).

Likewise, if your forum uses an HTTPS canonical url (again, as it should), trying to access it via http:// should result in a 302 redirect to https://.

Once you confirmed everything is okay, you can switch the redirect status to permanent. The redirect status code will be switched from 302 to 301. Browsers and search engines will cache those redirects and stop to consider those pages as duplicates.

After all of this is done you can also submit your forum for a scan on the MigrateToFlarum Lab as an additional check 😉.

Rescue mission

If you somehow get locked out of your forum because of a faulty redirect, here's what you can do:

  • If you changed your forum hostname, update the url value in config.php and the extension will now redirect to that new url
  • If you need to disable the redirects but don't have access to the dashboard anymore, you can manually edit the migratetoflarum-canonical.status entry in the settings table of your forum database. Set the value to 0 to disable the redirects

In any case, if a permanent redirect was cached and prevents you from accessing the address you need, you might have to clear:

  • Your browser cache
  • Cloudflare cache or the cache of other proxies your website is using
  • If a search engine cached an incorrect redirect, you'll have to wait for it to expire or try to manually submit the page to the search engine for a new try

A MigrateToFlarum extension

This is a free extension by MigrateToFlarum, an online forum migration tool (launching soon). Follow us on Twitter for updates

Need a custom Flarum extension ? Contact Clark Winkelmann !


© 2024 Hyn by Daniël "Luceos" Klabbers. All rights reserved. · Extensions and extension information is provided by the respective (copyright holding) authors. · Extiverse is not affiliated to the Flarum project or Flarum foundation. · Images on Extiverse pages are from Unsplash.