PHP cookie not set within AJAX call

Question

I'm trying to set a cookie within an AJAX call after I get the response of an API. The API and AJAX call are working fine, but the cookie is not being set.

I used the 'COOKIEPATH' and 'COOKIE_DOMAIN' constant of WordPress, as described in this post: https://stackoverflow.com/a/8531421/4638682 but this does not seem to do anything. What am I doing wrong? Here's my AJAX call:

function run_zipcodecheck()
{

    if (empty($_POST['zipcode'])) {
        exit;
    }

    $zipcode = str_replace(' ', '', $_POST['zipcode']);
    $link = 'https://import-nl.eflorist.net/api/CheckDelivery?pc=' . $zipcode . '&kd=0';
    $deliverytoday = get_api_data($link);
    $args = [];

    if (!empty($deliverytoday) && ($deliverytoday == '"1"' or $deliverytoday == '1')) {
        $type = 'success';
        $args['title'] = __("You can get flowers delivered today if you're quick!", 'qore');
        $args['close'] = 'false';
        $args['class'] = 'my-6';
        $cookieVal = '1';
    } else {
        $type = 'warning';
        $args['title'] = __("Unfortunately, delivery of bouquets is no longer possible for today.", 'qore');
        $args['close'] = 'false';
        $args['class'] = 'my-6';
        $cookieVal = '0';
    }

    setcookie('user-zipcode', $zipcode, MONTH_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN);
    setcookie('delivery-today', $cookieVal, DAY_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN);
    get_template_part('includes/components/alert', $type, $args);
    wp_die();
}

The 'get_api_data' is simply a wp_remote_get function with some error handles, but is working fine.

Hope you guys can help me out.

Answer 1

Apparently I was missing the time() attribute. So when adding this to the expire option in the setCookie function, the cookie is being set.

Code:

setcookie('user-zipcode', $zipcode, time() + MONTH_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN);
setcookie('delivery-today', $cookieVal, time() + DAY_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN);