Save items in the table

[McDeKi]

Hello, I was wondering how I should do save system for my inventory.

  
--//Zapis przedmiotow\\-- 
function zapiszEkwipunek() 
    for k,v in pairs( Plecak )do 
        for i=1, wysokoscY do 
          if not (Plecak[k][i] == false) then 
              outputChatBox(k.."|"..i.."|"..Plecak[k][i].id) 
            end 
        end 
    end 
end 
  

It works fine, output all items in inventory, for example here is the item with id 4, in the slot 5|1 and it outputs 5|1|4

What function I should use, split and gettok or table.insert and table.concat.

[Weii.]

function zapiszEkwipunek() 
testing = {} 
    for k,v in pairs( Plecak )do 
        for i=1, wysokoscY do 
          if not (Plecak[k][i] == false) then 
              table.insert(testing, v) 
            end 
        end 
    end 
    return testing 
end 
  
-- and they save it like 
inventoryJson = toJSON(zapiszEkwipunek()) 
  
-- and get it from json 
inventoryTable = fromJSON(inventoryJson) 

[McDeKi]

I must save it according to scheme: Xslot, Yslot, ID for example (4,1,1|next Item|next Item) then I must save it in mysql as string and read the substrings, then I'm gonna add the items in the slots according to scheme X, Y, ID