s as $header ) { if ( empty( $_SERVER[ $header ] ) ) { throw new \Exception( sprintf( 'The %s header cannot be empty.', $header ) ); } } } private function get_action_name( $event_type ) { return 'wc_ppcp_webhook_event_' . strtolower( $event_type ); } private function stop() { $this->stop_request = true; } }