Lua Blue Arrow when drop item rare

[Carlitos Flow]

Hello, im trying to add the magic effect #55 when x player drops x item (like an item rare) from a corpse of monster, its not working, anyone can help me please? Thanks (already registed in login)
-(Arrow effect appear on the corpse from the monster)
I was testing with print console and only prints number 0 and 1

local effect = 55                             
local arrow = {55, 60}                     --Effect and seconds.

function isRare(itemid)
local items = {5897, 2666, 3976}          --IDs from items
 return isInArray(ids, itemid)
end

function sendEffect(pos, time)
    if time < 0 then
        return true
    end
    doSendMagicEffect(pos, arrow[1])
    addEvent(sendEffect, 1000, pos, time - 1)
end
local function func(cid, position, corpseid, effect)
    print(1)
    if not isCreature(cid) then return true end
    local corpse = getTileItemById(position, corpseid).uid
    if corpse <= 1 then return end
    if not isContainer(corpse) then return true end
    for slot = 0, (getContainerSize(corpse)-1) do
        local item = getContainerItem(corpse, slot)
        if item.uid <= 1 then return end
        if isRare(item.itemid) then
            print(2)
            return doSendMagicEffect(position, effect)
        end
    end
end
function onKill(cid, target, lastHit)

    print(0)
    if not isMonster(target) then return true end
    local corpse = getMonsterInfo(getCreatureName(target)).lookCorpse

    addEvent(func, 5, getCreatureSummons(cid)[1], getThingPos(target), corpse, effect)
    return true
end

 

[pink_panther]

local corpseId = getMonsterInfo(getCreatureName(target)).lookCorpse

Is there another way to get corpse ID?

getMonsterInfo and getCreatureName dont exist for me, using a downgraded version of tfs1.2 for tibia 7.7

Edit: this

local corpseId = MonsterType(target:getName()):getCorpseId()