# Add domains and choose the PHP version on Windows hosting

> Run more sites on one HyperDC Windows hosting service: add an add-on domain or subdomain, pick the PHP version of each site and set your own custom error pages.

Difficulty: Beginner

One Windows hosting service can hold more than one site, within your plan's limits. You add them in the **Websites** tab of your service page, and each gets its own folder, application pool and PHP settings.

## Add an add-on domain or subdomain

1. Open **Websites** and select **Add Domain**.
2. Under **Type**, choose **Add-on Domain** or **Subdomain**.
3. Enter the **Domain name**, such as `example.org` or `blog.example.com`. For a subdomain, choose the site it **Belongs to**.
4. Leave **Document root** empty to have a folder created for you, and choose the **PHP version**.
5. Select **Add Domain**.
6. Point the new name to the **Server IP address** shown on **Overview**; see [point a domain to your server](/guides/point-domain-to-server).

**Verify:** the name appears in the list with its document root. Upload a file there with [File Manager](/guides/windows-hosting-files-ftp) and open the address.

## Choose the PHP version of a site

1. In **Websites**, select **Settings** next to the site.
2. Under **PHP**, choose the **PHP version**: 7.4, 8.1, 8.2, 8.3, 8.4 or 8.5. **No PHP** turns it off for this site.
3. Select **Save Settings**, then **Save And Restart**.

**Verify:** a page on the site that prints `phpversion()` shows the version you chose. Delete that page afterwards.

## Set a custom error page

1. Upload your page, such as `/errors/404.html`, in **File Manager**.
2. In **Websites**, select **Settings** next to the site and go to **Custom error pages**.
3. Select **Add Error Page**, enter the **Status code**, such as `404`, and the **Page**.
4. Select **Save Settings**, then **Save And Restart**.

**Verify:** an address that does not exist shows your page, and the browser still receives a 404.

## Next steps

- A blog on the new site: [install WordPress on Windows hosting](/guides/install-wordpress-windows-hosting).
- Errors from an ASP.NET site: [ASP.NET and IIS errors](/guides/aspnet-iis-errors).

## Frequently asked questions

### How many domains can I add?

Your plan sets the number. The Add a domain form shows how many add-on domains and subdomains your plan allows.

### Which PHP versions can I choose?

PHP 7.4, 8.1, 8.2, 8.3, 8.4 and 8.5. Each site can use its own version, or none.

### Do my visitors notice when I save settings?

Saving restarts the site's application pool. Visitors may wait a few seconds, and sessions kept in memory are lost.

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Source: <https://hyperdc.com/guides/products/windows-hosting-domains-php>\
Updated: 2026-11-02