jcmp_clear_inventory

--disclaimer: urik: this is not mine, copied it from jc-mp forums ages ago

function OnPlayerChat(args)
    local inventory = args.player:GetInventory()
        if args.text == "/clearinv" then
            for k,v in pairs(inventory) do
            print(k,v)
            end
            if table.count(inventory) == 0 then
                Chat:Send(args.player, "You aren't carrying any weapons", Color.Red)
            else
                args.player:ClearInventory()
                Chat:Send(args.player, "Your inventory has been cleared", Color.Lime)
            end
        end
end

Events:Subscribe("PlayerChat", OnPlayerChat)