$whoisStart	= "311";
$whoisPnick	= "330";
$whoisEnd	= "318";

if ( $eventNum == $whoisStart ) {

	$pnick = "";
	$ident = "ident"; $host = "host";
}
	
if ( $eventNum == $whoisPnick ) {
	
	$pnick = "pnick";
}

if ( $eventNum == $whoisEnd ) {

	$nick["ident"] = $ident;
	$nick["host"] = ...
	$nick["pnick"] = ( $pnick == "" ? "Not logged in" : $pnick );
}