The `http_allowed_safe_ports` WordPress filter modifies the list of ports considered safe in the HTTP API, allowing users to control external requests
The `home_url` WordPress filter modifies the home URL of a site by adding a custom function, changing the scheme, path, or redirection to another site
The WordPress 'heartbeat_settings' PHP filter allows developers to customize the frequency and behavior of the Heartbeat API. This can improve site performance and reduce server load.