Something

                if (strtolower(substr($msgwithoutident, 0, 4)) == 'join' && $data->host == "unaffiliated/aheartattack/x-000001")
                {
                        $message = substr($msgwithoutident, 5, strlen($msgwithoutident)-5);
			$i = 0;
			global $channels;
			while ($i != count($channels))
			{
				if ($channels[$i] == 'nothing') { $i++; }
				if ($channels[$i] == $message)
				{
					$irc->message(SMARTIRC_TYPE_CHANNEL, $recip, $data->nick.': I\'m already on that channel!');
					return;
				}
				$i++;
			}
			array_push($channels, $chan);
                        $irc->join($message);
                        $irc->message(SMARTIRC_TYPE_CHANNEL, $message, 'Hello Everyone!')
                }