Churn Reduction for WordPress SaaS

// Check license status on admin_init
add_action('admin_init', 'myplugin_check_license');

function myplugin_check_license() {
    $license_key = get_option('myplugin_license_key');
    if (empty($license_key)) return;

    // Check license against your server (cache for 12 hours)
    $cache_key = 'myplugin_license_status';
    $status = get_transient($cache_key);

    if ($status === false) {
        $response = wp_remote_get(
            'https://api.yourplugin.com/v1/license/check',
            [
                'timeout' => 10,
                'body'    => ['key' => $license_key, 'site' => home_url()],
            ]
        );

        if (is_wp_error($response)) return; // Fail open, don't punish network issues

        $body   = json_decode(wp_remote_retrieve_body($response), true);
        $status = $body['status'] ?? 'unknown';
        set_transient($cache_key, $status, 12 * HOUR_IN_SECONDS);
    }

    if ($status === 'expired') {
        $expired_at   = get_option('myplugin_license_expired_at', time());
        $grace_days   = 14;
        $days_expired = (time() - $expired_at) / DAY_IN_SECONDS;

        if ($days_expired <= $grace_days) {
            // Show admin notice during grace period
            add_action('admin_notices', function () use ($days_expired, $grace_days) {
                $remaining = ceil($grace_days - $days_expired);
                echo '<div class="notice notice-warning"><p>';
                echo "Your license expired. Premium features will be disabled in {$remaining} days. ";
                echo '<a href="https://yourplugin.com/renew">Renew now</a></p></div>';
            });
        } else {
            // Grace period over. disable premium features
            update_option('myplugin_premium_active', false);
        }
    }
}

// Trigger save flow when subscription status changes
add_action(
    'woocommerce_subscription_status_changed',
    'myplugin_handle_subscription_change',
    10, 3
);

function myplugin_handle_subscription_change($subscription_id, $old_status, $new_status) {
    $subscription = wcs_get_subscription($subscription_id);
    $user_email   = $subscription->get_billing_email();
    $user_name    = $subscription->get_billing_first_name();
    $product      = $subscription->get_items();

    // Pending cancellation. merchant requested cancel but sub is still active
    if ($new_status === 'pending-cancel') {
        wp_mail($user_email, "Before you go, {$user_name}...",
            "We noticed you're canceling your subscription.\n\n" .
            "Would any of these help?\n" .
            "- Pause for up to 3 months (no charge)\n" .
            "- Downgrade to our Starter plan at 50% off\n" .
            "- A quick call with our team to fix whatever isn't working\n\n" .
            "Reply to this email and we'll sort it out."
        );

        // Log for analytics
        do_action('myplugin_churn_event', [
            'type'            => 'pending_cancel',
            'subscription_id' => $subscription_id,
            'email'           => $user_email,
        ]);
    }

    // On-hold. usually a payment failure
    if ($new_status === 'on-hold' && $old_status === 'active') {
        wp_mail($user_email, "Action needed: your {$user_name} subscription",
            "Your payment could not be processed.\n\n" .
            "Update your card here to keep your access: " .
            $subscription->get_view_order_url()
        );
    }
}