ID ); $receive_sms = isset( $_POST['_ywsn_receive_sms'] ) ? 'yes' : 'no'; yit_save_prop( $order, '_ywsn_receive_sms', $receive_sms, true ); } } /** * Unique access to instance of YWSN_Metabox class * * @return \YWSN_Metabox */ function YWSN_Metabox() { return YWSN_Metabox::get_instance(); } new YWSN_Metabox(); }