Redirect non trailing slash urls to trailing slash urls

Hello,

Thank you for contacting the support and sorry for any inconvenience that might have been caused due to that.

To fix the trailing slash you can use the following filter and paste it inside your theme’s function.php file.

/**
 * Allow changing of the canonical URL.
 *
 * @param string $canonical The canonical URL.
 */
add_filter( 'rank_math/frontend/canonical', function( $canonical ) {
	return trailingslashit( $canonical );
});

Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.

Hello,

If the page has canonical URL then the filter will simply put slash at the end of the URL inside the source code of the page. If you want to redirect the page from non-slash to slash URL, then you do with the Rank Math redirection module.

Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.