I have done below modifications in your website:
1) Setup a custom post type "my-order"
versteckter Link
2) Setup a field group to post type "my-order"
versteckter Link
with two custom fields:
- adult-number
- children-number
3) I assume you are using:
- custom field "prezzo-1" stores "adult-price" value
- custom field "prezzo-2" stores "child-price" value
4) Setup the post form "bookform 2", in the post content, add a hidden field:
versteckter Link
[cred_generic_field type='hidden' field='product-id']
{
"default":"[wpv-post-id]"
}
[/cred_generic_field]
use it to pass the product post ID
5) in above post form, in section "Toolset Forms Commerce", enable option "Charge payment with this form"
6) Add below codes into your theme file "functions.php":
// Change the product ID
add_filter('cred_commerce_add_product_to_cart', function($product_id, $form_id, $post_id){
if($form_id == 24662){
if(isset($_POST['product-id'])){
$product_id = $_POST['product-id'];
}
}
return $product_id;
}, 20, 3);
// add URL parameter to checkout page
add_filter('cred_commerce_form_action', function($action, $form_id, $post_id, $form_data){
$url = get_permalink( wc_get_page_id( 'checkout' ) );
if($form_data['id']==24662){
$url = add_query_arg( array(
'target_post_id' => $post_id,
), $url );
}
wp_redirect( $url);
exit();
}, 999, 4);
// change the price in cart
add_action('woocommerce_before_calculate_totals', function(){
if($form_id != 24662 && !isset($_GET['target_post_id']))return;
global $woocommerce;
$post_id = $_GET['target_post_id'];
$price = 0;
foreach ( $woocommerce->cart->get_cart() as $key => $cart_item ) {
$product_id = $cart_item['data']->get_id();
$adult_price = get_post_meta($product_id, 'wpcf-prezzo-1', true);
$adult_num = get_post_meta($post_id, 'wpcf-adult-number', true);
$child_price = get_post_meta($product_id, 'wpcf-prezzo-2', true);
$child_num = get_post_meta($post_id, 'wpcf-children-number', true);
$price = $adult_price * $adult_num + $child_price * $child_num;
$cart_item['data']->set_price($price);
}
}, 999);
7) Put the post form into your layout, see the bottom of it, row 13
versteckter Link
Test it in front-end:
versteckter Link
After submit the form, you should be able to see the price is changed. and it is only an demo for your reference.
