Easy Digital Downloads - Add Handling Fee

functions.php

function cg_add_handling_fee()
{
    $current_user = wp_get_current_user();
    if ($current_user !=0) {
        $userId = $current_user->ID;
        $subscriber = new EDD_Recurring_Subscriber($userId, true);
        $subscription = new EDD_Subscription($userId); //subscriber id
        //expiration date check
        $expiration_date = $subscription->get_expiration();
        if (strtotime($expiration_date) > strtotime('-5 day')) {
            //check for total payments is less than 5 times
            if ($subscription->get_total_payments() < 5) {
                EDD()->fees->add_fee('10', 'Handling Fee', 'handling_fee');
            }
        }
        $status = $subscription->get_status();
        if (strtolower($status) == 'cancelled') {
            EDD()->fees->add_fee('10', 'Handling Fee', 'handling_fee');
        }
    }

}
add_action( 'init', 'cg_add_handling_fee' );