My version of mathex's world chat

local ChatMsg = "#chat"

local function WorldChat(event, player, message, type, language)
    if(string.find(message, ChatMsg) == 1) then
        message = message:gsub(ChatMsg, "")
        if (GMrank == 'az') then
            message = "|cFF3e3eff[Admin]|cFF00ca34["..player:GetName().."]:|cFFFFA500"..message
        elseif (GMrank == 'a') then
            message = "|cFF3e3eff[GM]|cFF00ca34["..player:GetName().."]:|cFFFFA500"..message
        elseif (GMrank == 'v') then
            message = "|cFF3e3eff[VIP]|cFF00ca34["..player:GetName().."]:|cFFFFA500"..message
        else
            message = "|cFF00ca34["..player:GetName().."]:|cFFFFA500"..message
        end
        SendWorldMessage(message, 2)
        return false
    end
end

RegisterServerHook(16, WorldChat)