<?php defined( 'ABSPATH' ) or die(); add_filter( 'rsssl_fields', function( $fields ) { return array_merge( $fields, [ [ 'id' => 'letsencrypt', 'menu_id' => 'encryption_lets_encrypt', 'group_id' => 'encryption_lets_encrypt', 'type' => 'lets-encrypt', 'default' => false, 'server_conditions' => [ 'relation' => 'AND', [ 'rsssl_letsencrypt_generation_allowed' => true, ] ], ], ] ); }, 200 );