Forums Scripts & Popups Make Input to Lowercase output

Hi. i want to make a Input command that outputs it in lowercase.
Senario, My Channel is HeY2 when i type !test the bot returns : #hey2
when my channel is hey3 and i say !test it returs : #hey3.

So what i want is to make a simple script that makes $chan to $chan lowercased

$lower($chan)

Thank you