How to get order meta from array in WooCommerce 3+

I need to create a function that returns a value to one of my plugins [**WooCommerce Dymo Print**][1]. It requires `$order_id`, `$label` and `$object`. The `$object` is the field I need to return the value to.

I created the following code:

add_filter('wc_dymo_order_function', 'wpf_dymo_order_output',10,3);
function wpf_dymo_order_output( $order_id, $label, $object ) {

if($label=='shipping' && $object='DEL_DATE') {

//Get order from order ID
$order=wc_get_order($order_id);
$del_date='';

$order_data = $order->get_data(); // The Order data
$order_del_date = $order_data['delivery_date'];

//Return a list (string) of all product inside this order, make sure it's well formatted before printing.
return $order_del_date;
} else {
//Return order_id if is not correct label and object
return '';
}
}

It doesn't seem to work however and I think it's because the delivery_date is nested in an array and I'm not fetching it properly.

The meta data should look something like this.

Array
(
[31040763] => Array
(
[shipment_id] => 31040763
[tracktrace] => 3SMYPA000000000
[shipment] => Array
(
[barcode] => 3SMYPA000000000
[pickup] => Array
(
[postal_code] => XXXAA
[street] => STRAAT
[city] => STAD
[number] => XX
[location_name] => Gamma
)
[options] => Array
(
[signature] => 0
[delivery_date] => 2018-03-10 00:00:00
)
)
)
)

Where the delivery_date is what I need to return


[1]:

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Solved it with the following code:

$order=wc_get_order($order_id);

$order_data = $order->get_meta('_shipments');
$final_array = array_values($order_data);
$order_del_date = $final_array[0]['options']['delivery_date'];

return $order_del_date;

You can use `get_post_meta` to get the meta value.

get_post_meta( $order_id, 'your_meta_key', true );

Simple but effective.