I created a  Reboot verification from  previous post, I want this script to accept an argument to run local on the box or remote.

./verifyreboot.ps1 (local)
./verifyreboot.ps1 (remote) (strcomputer)

if no arg passed script will write-host and exit.  If Local only one argument needed and it will pull a (function local).  If its remote it will pull a (function remote) and will pass arsg1 and args2 to the function.

In your script, you would use a parameter block. So something like:

param(
        [switch]$Local,
        [string]$Remote = ''
     )

if ($Local)
{
    'LOCAL PARAM PRESENT'
    # CALL LOCAL FUNCTION HERE
    return
}
if ($Remote -ne '')
{
    "Remote set to $Remote"
    # CALL REMOTE FUNCTION HERE
    return
}

'No Params present'