Here is my code for an !uptime command. I'm sure you could modify it to do what you want.

Code:
on *:text:!uptime*:#:{
  if ((%flooduptime) || ($($+(%,flooduptime.,$nick),2))) { return }
  set -u5 %flooduptime On
  set -u10 %flooduptime. $+ $nick On
  set %target $iif($2,$2,$mid(#,2-))
  set %channel #
  uptime
}

alias uptime {
  sockclose uptime
  sockopen uptime nightdev.com 80
}

on *:sockopen:uptime:{
  if ($sockerr) { sockclose $sockname | halt }
  sockwrite -n $sockname GET /hosted/uptime.php?channel= $+ %target HTTP/1.1
  sockwrite -n $sockname Host: www.nightdev.com
  sockwrite -n $sockname $crlf
}

on *:sockread:uptime:{
  if ($sockerr) { sockclose $sockname | halt }
  var %data
  sockread %data
  tokenize 32 %data
  if ($1 isnum) && ($2) { msg %channel $upper(%target) has been online/streaming for $1- }
  elseif (%data == The channel is not live.) msg %channel $upper(%target) is currently not online/streaming.

}

on *:sockclose:uptime:{
  unset %channel
  unset %target
}

-Majeye
www.twitch.tv/majeye
www.twitch.tv/majeyebot
https://github.com/Majeye/MajeyeBot