Getting value from custom checkout billing field in WooCommerce - php

Question

I added a field at the checkout following the woocommerce documentation this way:
/*Add document ID to checkout form*/
add_filter( 'woocommerce_checkout_fields' , 'ebani_cedula_checkout_field' );
// Our hooked in function - $fields is passed via the filter!
function ebani_cedula_checkout_field( $fields ) {
$fields['billing']['cedula'] = array(
'label' => __('Cédula de ciudadanía', 'woocommerce'),
'placeholder' => _x('Cédula', 'placeholder', 'woocommerce'),
'required' => true,
'class' => array('form-row-last'),
'clear' => true,
'priority' => 15
);
return $fields;
}
Then I want to show it on the admin order edit page this way:
/**
* Display field value on the order edit page
*/
add_action( 'woocommerce_admin_order_data_after_billing_address', 'cedula_checkout_field_display_admin_order_meta', 10, 1 );
function cedula_checkout_field_display_admin_order_meta($order){
echo '<p><strong>'.__('Cédula').':</strong> ' . get_post_meta( $order->get_id(), '_cedula', true ) . '</p>';
}
When I go to the order edit page I get an empty value for _cedula I don't know why, I'm just following the documentation, but it is not working, how can I get the data stored in the custom checkout field?

Answer 1

If you want this custom billing field to be saved when order is placed, it's better to use
the action hook woocommerce_billing_fields instead of woocommerce_checkout_fields like:
add_filter( 'woocommerce_billing_fields' , 'ebani_cedula_checkout_field' );
function ebani_cedula_checkout_field( $fields ) {
$fields['billing_cedula'] = array(
'label' => __('Cédula de ciudadanía', 'woocommerce'),
'placeholder' => _x('Cédula', 'placeholder', 'woocommerce'),
'required' => true,
'class' => array('form-row-last'),
'clear' => true,
'priority' => 15
);
return $fields;
}
add_action( 'woocommerce_admin_order_data_after_billing_address', 'cedula_checkout_field_display_admin_order_meta', 10, 1 );
function cedula_checkout_field_display_admin_order_meta($order){
if( $value = $order->get_meta('_billing_cedula') )
echo '<p><strong>'.__('Cédula').':</strong> ' . $value . '</p>';
}
Now your custom checkout billing field is saved.