As this code uses the Twitch API, you need to register your application on the Twitch Developers site.

When creating the app, you will need to enter an OAuth redirect URL - use the URL where the script will be located.

Choose "Website Integration" as the category and "Confidential" as Client Type

Once you create a developer application, you are assigned a client ID, and you will need to create a client Secret.

You will need to edit index.php and update the following constants:

const TWITCH_CLIENT_ID = 'CHANGEME';

const TWITCH_CLIENT_SECRET = 'CHANGEME';

Check the location where the token will be saved on your server. It must NOT be publically accessible.

Upload the files to your server and place this code in your HTML:

<iframe src="/streambadge/?user=TWITCHUSERNAME" name="twitch-status" scrolling="no" height="50px" width="220px" style="border: none;"></iframe>

Replace TWITCHUSERNAME with the channel name you require.

The Twitch API/token helper logic is now embedded directly in index.php.