This gist is useful for the Algolia plugin for WordPress when the backend URL is different from the frontend URL. Here we replace the `cms.` subdomain with the `www.` subdomain. After integrating this snippet in your code, you should trigger a full re-index.

different-backend-and-frontend-url.php

<?php

/**
 * @param array $shared_attributes
 *
 * @return array
 */
function custom_post_shared_attributes( array $shared_attributes ) {
	$shared_attributes['permalink'] = str_replace( 'cms.', 'www.', $shared_attributes['permalink'] );

	return $shared_attributes;
}

add_filter( 'algolia_post_shared_attributes', 'custom_post_shared_attributes' );
add_filter( 'algolia_searchable_post_shared_attributes', 'custom_post_shared_attributes' );