null !== $sitename ) { if ( 'www.' === substr( $sitename, 0, 4 ) ) { $sitename = substr( $sitename, 4 ); } $noreply_email .= $sitename; } return $noreply_email; } /** * Custom sender email. * * @return string */ public function custom_sender_email() { return $this->get_noreply_email(); } /** * Custom sender name. * * @return string */ public function custom_sender_name() { return $this->get_sender_name(); } /** * Get mail subject. * * @return string */ abstract protected function get_mail_message(); /** * Get mail subject. * * @return string */ abstract protected function get_mail_subject(); /** * Get sender name. * * @return string */ abstract protected function get_sender_name(); }