Some command thing

function account_OnChat(event, player, message, type, language)
    message = message:lower()
    local cmd, arg = message:match("^#(a[cn]) ?(.*)")
    -- local test = GetPlayersInWorld()
    if(cmd) then
        if(arg == "") then
            player:SendBroadcastMessage("Incorrect syntax. Usage: #"..cmd.." <player name>")
        elseif(cmd == "ac") then
            local Q = CharDBQuery("SELECT acct from mailbox_send_query where login = '"..arg.."'")
            if(Q) then
                local Q = CharDBQuery("SELECT a.name from characters a, mailbox_send_query b where a.acct = '"..(Q:GetColumn(0):GetString()).."' and a.online <> 0 and b.login = '"..arg.."'")
                if(Q) then
                    player:SendBroadcastMessage("|cFF4682B4Account von |r|cffff0000"..arg.."|r|cFF4682B4 ist mit dem Character |r|cffff0000"..Q:GetColumn(0):GetString().."|r|cFF4682B4 online.")
                end
            end
        elseif(cmd == "an") then
            local Q = CharDBQuery("SELECT acct from characters where name = '"..arg.."'")
            if(Q) then
                local Q = CharDBQuery("SELECT a.name from characters a, mailbox_send_query b where b.acct = '"..(Q:GetColumn(0):GetString()).."' and a.online <> 0")
                if(Q) then
                    player:SendBroadcastMessage("|cFF4682B4Der Player |r|cffff0000"..arg.."|r|cFF4682B4 ist mit einem anderem Character on: |r|cffff0000"..Q:GetColumn(0):GetString().." ")
                end
            end
        end
        return false
    end
    return true
end
RegisterServerHook(16, account_OnChat)