How can I add a default billing title to WooCommerce?

Question

I'm currently looking for a hook, to add a default billing title to the billing_title select to the WooCommerce checkout and change-address setting at the MyAccount page.

It should be something like Please select salutation and should be a required field. This field comes from the WooCommerce Germanized plugin and is a required field in Germany. Because of this there is no documentation about this (sadly).

Answer 1

这是我的解决方案：

/**
 * Add billing title default selection value
 */
add_filter( 'woocommerce_gzd_title_options', 'add_new_billing_title', 10, 1 );
function add_new_billing_title( $titles ) {
    array_unshift( $titles, 'Bitte auswählen' );

    return $titles;
}

我正在使用array_unshift添加默认的请选择德语值作为选择中的第一个元素。