Sub Counter for YouTube Chat

I wrote a script for getting a sub count. Replace CHANNEL_ID with the channel ID.

$(urlfetch https://rokbot.xyz/ytsubs.php?id=CHANNEL_ID)

By Channel ID, I'm guessing that I put my channel link in that spot? Copy/Paste the link I mean.

And where do I post your script at inside of Nightbot? Custom commands? Not sure.

This is for a custom command. Here's how to find a channel ID.

But where do I actually post the script?

We add custom commands through chat by !addcom or by the Nightbot dashboard.