WordPress add field to checkout, can't add user meta to value

Question

I'm trying to add an extra form field to woocommerce checkout, and populate it with an existing user meta value if exists, but I can't seem to get the value attribute to render.

$user_meta_billing_licence_number traces to the error log, and it will show up in the label if I append it to the label, and to the placeholder, if I append it to the placeholder, but not to the value attribute. What am I doing wrong?

add_filter('woocommerce_billing_fields', 'custom_billing_fields', 20 );
function custom_billing_fields( $fields ) {
    // Add license field.
    $user_id = get_current_user_id();
    $user_meta_billing_licence_number = (string)get_user_meta( $user_id, 'billing_licence_number', true );
    error_log('debug: line 117: billing_licence_number = '.$user_meta_billing_licence_number);
    $fields['billing_licence_number'] = array(
        'label'     => __('License Number (for use on certificates)', 'woocommerce'),
        'required'  => false,
        'class'     => array('form-row-wide'),
        'clear'     => true,
        'placeholder' => 'Recommended format: MA12345'.$user_meta_billing_licence_number,
        'value'     => $user_meta_billing_licence_number
    );
    return $fields;
}

Lou Groshek Lou Groshek · Accepted Answer · 2018-10-25T23:18:40

So... looks like you can't pass the value in through this filter. You have to intercept it later, and override the value fetching during the printing of the fields:

<?php foreach ( $checkout->checkout_fields['billing'] as $key => $field ) : ?>

    <?php

        if($key == 'billing_licence_number') {
            $uID = get_current_user_id();
            woocommerce_form_field( $key, $field, get_user_meta($uID, 'billing_licence_number', true));
        } else {
            woocommerce_form_field( $key, $field, $checkout->get_value( $key ) );
        }

    ?>

<?php endforeach; ?>

WordPress add field to checkout, can't add user meta to value

1 Answers