A few things you can improve on.
- Get all of them using a single request:
https://api.twitch.tv/kraken/streams?channel=channel1,channel2,and,so,on - Load the page first and make the API call on the client-side, allowing you to show a friendly loading icon or something else.
- Use cURL instead of
file_get_contents.file_get_contentswon’t allow you to handle errors or send the Client ID well at all.