A shitty Slack bot made in PHP that abused webhooks!
Clone this repo on any folder that is public accesible to the internet (it's a php script, duh).
On your slack team settings, create a new outgoing webhook and configure it and add the token to the configuration in slack.php.
Create your custom commands (see $commandData reference here). and add them to your script.
Do your command and get output!
A basic command is included in slack.phpthat you can call with !welcome.