Saving data to WooCommerce session
It's more saying Thank you for solving my problem. But here is an answer, too:
The post meta could not been updated because there is no $order_id parameter in your callback function. This should do the trick:
function retrieve_and_save_group_input_value_to_order_meta( $order_id ) { $retrived_group_input_value = WC()->session->get( 'group_order_data' ); update_post_meta( $order_id, '_create_new_group', $retrived_group_input_value );}add_action('woocommerce_checkout_update_order_meta', 'retrieve_and_save_group_input_value_to_order_meta');
Here is another approach.
1st page:
session_start();//place this at the top of all code $data = $_POST['create_new_group']; $_SESSION['custom_create_new_group']=$data;Now in another page write the following to receive the value:
session_start(); //optional $retrive_price = $_SESSION['custom_create_new_group'];