Block a specific url request

Like you suggested, use WP_HTTP_BLOCK_EXTERNAL to stop all external URL requests. And then use WP_ACCESSIBLE_HOSTS to set allowed URLs. From the WP Codex, found on this page. wp-config.php define( ‘WP_HTTP_BLOCK_EXTERNAL’, true ); define( ‘WP_ACCESSIBLE_HOSTS’, ‘api.wordpress.org,*.github.com’ ); Block external URL requests by defining WP_HTTP_BLOCK_EXTERNAL as true and this will only allow localhost and your blog to … Read more