使用woocommerce预订动态询问人名。

我正在使用woo commerce预订插件来预订旅行，但我想根据人数动态地在结帐页面上分别获取每个人的类型名称。我发现堆栈溢出的帖子对我不起作用，它在结帐页面上始终显示未定义的偏移量0作为错误。

I tried this function already.

//* Add a new checkout field
add_filter( 'woocommerce_checkout_fields','ppp_filter_checkout_fields' );
function ppp_filter_checkout_fields($fields){
$fields['extra_fields'] = array(
'participant_details' => array(
'type' => 'participant_details','required' => false,'label' => __( 'Participant Details' )
),);
// Add a "persons" hidden input field
foreach( WC()->cart->get_cart() as $cart_item ) {
$persOns= $cart_item['booking']['_persons'][0];
}
echo '';
return $fields;
}
//* Add the field to the checkout
add_filter( 'woocommerce_form_field_participant_details','ppp_filter_checkout_field_group',10,4 );
function ppp_filter_checkout_field_group( $field,$key,$args,$value ){
$op_cart_count = WC()->cart->get_cart_contents_count();
$items = WC()->cart->get_cart();
foreach($items as $item) {
$person = $item['booking']['_persons'][0];
}
if ($person > 1) {
$html = '';
$html .= "

Deelnemers

这是我试图实现这一目标的网站。
Website

// Add checkout custom text fields
add_action( 'woocommerce_before_order_notes','add_checkout_custom_text_fields',20,1 );
function add_checkout_custom_text_fields( $checkout) {
$index = 0;
// 1st Loop through cart items
foreach(WC()->cart->get_cart() as $cart_item){
$index++;
// 2nd Loop through each unit related to item quantity
for($i = 1; $i <= $cart_item['booking']['Adults']; $i++){
woocommerce_form_field("Adult[$index][$i]",array(
'type' =>'text','class'=>array('my-field-class form-row-wide'),'label'=>__('Adult Name')." ($i)",'placeholder'=>__('Enter adult name'),),$checkout->get_value("Adult[$index][$i]"));
}
for($i = 1; $i <= $cart_item['booking']['Childs']; $i++){
woocommerce_form_field("Child[$index][$i]",'label'=>__('Child Name')." ($i)",'placeholder'=>__('Enter child name'),$checkout->get_value("Child[$index][$i]"));
}
}
}