Redirect users to URL with anchor

Hi– thanks for using Force Login!

How can I redirect users to the URL they try to reach without losing the anchor?

Unfortunately, it’s not possible to know the anchor since the hash (the string including the #) never gets passed to the server, it is solely a behavioral property of the browser.

You can use Javascript to get the hash value, but then the page has loaded to run Javascript instead of having the PHP (server-side) redirect visitors to the login screen.

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However, you may change the url passed to the ?redirect_to= query using the v_forcelogin_redirect filter. Below is an example of sending visitors trying to visit your “/my-article” page to a specific anchor.

/**
 * Set the URL to redirect to on login.
 *
 * @return string $redirect_url URL to redirect to on login. Must be absolute.
 */
function my_forcelogin_redirect( $redirect_url ) {
  if ( is_page('my-article') ) {
    $redirect_url = site_url( '/my-article/#subject-3' );
  }
  return $redirect_url;
}
add_filter( 'v_forcelogin_redirect', 'my_forcelogin_redirect' );

The code example using the v_forcelogin_redirect filter only changes the redirect URL to an anchor link for that one page, is_page('my-article'), else it defaults to just the page url they tried to visit.

Examples:

If a visitor tried to access /another-page/ they would be redirected to /another-page/ after a successful login.

If a visitor tried to access /my-article/#subject-1 they would be redirected to /my-article/#subject-3 after a successful login.

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The code example using the v_forcelogin_redirect filter shows you how you could alter the redirect URL, but like I said before– it’s not possible to know the anchor since the hash (the string including the #) never gets passed to the server.

No problem, thanks for using Force Login! 🙂