How do I get order nested meta data in WooCommerce 3 - php

Question

We have installed another plugin for WooCommerce called Booster Plus for WooCommerce and this plugin can modify the checkout page by paying for an order by invoice number.
I am customizing our thank you page by displaying the invoice number too. Currently, I am not able to do that because I don't know how can I properly get the value of the nested $order->get_data() result.
<?php
$order_data = $order->get_data();
print_r($order_data);
?>
The result of order_data above looks like below:
(
[id] => 7403
[discount_total] => 0
[discount_tax] => 0
[shipping_total] => 0.00
[shipping_tax] => 0
[cart_tax] => 2.47
[total] => 21.47
[total_tax] => 2.47
[customer_id] => 20
[order_key] => wc_order_8pt3q7T79
[billing] => Array
(
[first_name] => John
[last_name] => Done
[company] => g2x
[address_1] => 3134 James Street
[address_2] =>
[city] => Moose Factory
[state] => ON
[postcode] => P0L 1W0
[country] => CA
[email] => testjohndoe123#gmail.com
[phone] => 705-658-2112
)
[cart_hash] => 087347d19dff4677dc8kaeb2b2c653c6
[number] => 7403
[meta_data] => Array
(
[0] => WC_Meta_Data Object
(
[current_data:protected] => Array
(
[id] => 102652
[key] => mailchimp_woocommerce_campaign_id
[value] =>
)
[data:protected] => Array
(
[id] => 102652
[key] => mailchimp_woocommerce_campaign_id
[value] =>
)
)
[1] => WC_Meta_Data Object
[2] => WC_Meta_Data Object
[3] => WC_Meta_Data Object
[4] => WC_Meta_Data Object
[5] => WC_Meta_Data Object
(
[current_data:protected] => Array
(
[id] => 102694
[key] => _wcj_custom_payment_gateway_input_fields
[value] => Array
(
[pay_by_po] => 123456789
)
)
[data:protected] => Array
(
[id] => 102694
[key] => _wcj_custom_payment_gateway_input_fields
[value] => Array
(
[pay_by_po] => 123456789
)
)
)
[coupon_lines] => Array
()
)
Do you know how can I get the value of [pay_by_po] which is 123456789? Any help is greatly appreciated. Thank you.

Answer 1

You can get and unprotect this nested meta data using WC_data method get_meta_data(), which gives an array of WC_Meta_Data Objects:
$meta_data = $order->get_meta_data();
print_r($order_data);
Then on each WC_Meta_Data Object, you can use WC_Meta_Data available methods like get_data() that gives an unprotected data array:
foreach( $order->get_meta_data() as $meta_data_obj ) {
$meta_data_array = meta_data_obj->get_data();
print_r($meta_data_array);
$meta_key = $meta_data_array['key']; // The meta key
$meta_value = $meta_data_array['value']; // The meta value
}
You can also get directly any nested meta data from the order using WC_Data method get_meta() from aspecific meta key as follow:
$meta_value = $order->get_meta('_wcj_custom_payment_gateway_input_fields');
print_r($meta_value);
Note This nested meta data exist since WooCommerce version 3.
About Abstract WC_Data Class
Its Implemented by classes using the same CRUD(s) pattern.
Direct known subclasses:
WC_Abstract_Legacy_Order, WC_Abstract_Legacy_Product, WC_Customer_Download, WC_Customer_Download_Log, WC_Legacy_Coupon, WC_Legacy_Customer, WC_Legacy_Payment_Token, WC_Legacy_Shipping_Zone, WC_Legacy_Webhook, WC_Order_Item
Indirect known subclasses:
WC_Abstract_Order, WC_Coupon, WC_Payment_Token, WC_Payment_Token_CC, WC_Payment_Token_ECheck, WC_Product, WC_Product_External, WC_Product_Grouped, WC_Product_Simple, WC_Product_Variable, WC_Product_Variation, WC_Shipping_Zone, WC_Customer, WC_Webhook, WC_Order, WC_Order_Item_Coupon, WC_Order_Item_Fee, WC_Order_Item_Product, WC_Order_Item_Shipping, WC_Order_Item_Tax, WC_Order_Refund
See: Developing using WooCommerce CRUD objects