Redirect add to cart

Hi, is it possible to redirect a link of the add to cart button depending on the product quantity?
The button works in ajax, which hook should I use?
I tried to use this code on the theme function, but it doesn’t work:

function check_quantity() {
    $adult_number=$_POST['adult_number'];
    $child_number=$_POST['child_number'];
    $infant_number=$_POST['infant_number'];
    $total = $adult_number + $child_number + $infant_number;
    if ($total > 4){
        wp_redirect( get_home_url().'/viaggi-gruppo/');
        exit;
    }
}
add_filter('woocommerce_add_to_cart', 'check_quantity');

How can I do?

• This topic was modified 3 years ago by giuliastully.