qb-core-qbcore-fivem/shared/main.lua

QBShared = {}

local StringCharset = {}
local NumberCharset = {}

for i = 48,  57 do NumberCharset[#NumberCharset+1] = string.char(i) end
for i = 65,  90 do StringCharset[#StringCharset+1] = string.char(i) end
for i = 97, 122 do StringCharset[#StringCharset+1] = string.char(i) end

QBShared.RandomStr = function(length)
    if length <= 0 then return '' end
    return QBShared.RandomStr(length - 1) .. StringCharset[math.random(1, #StringCharset)]
end

QBShared.RandomInt = function(length)
    if length <= 0 then return '' end
    return QBShared.RandomInt(length - 1) .. NumberCharset[math.random(1, #NumberCharset)]
end

QBShared.SplitStr = function(str, delimiter)
    local result = { }
    local from = 1
    local delim_from, delim_to = string.find(str, delimiter, from)
    while delim_from do
		result[#result+1] = string.sub(str, from, delim_from - 1)
        from = delim_to + 1
        delim_from, delim_to = string.find(str, delimiter, from)
    end
	result[#result+1] = string.sub(str, from)
    return result
end

QBShared.Trim = function(value)
	if not value then return nil end
    return (string.gsub(value, '^%s*(.-)%s*$', '%1'))
end

QBShared.Round = function(value, numDecimalPlaces)
    if not numDecimalPlaces then return math.floor(value + 0.5) end
    local power = 10 ^ numDecimalPlaces
    return math.floor((value * power) + 0.5) / (power)
end

QBShared.ChangeVehicleExtra = function (vehicle, extra, enable)
	if DoesExtraExist(vehicle, extra) then
		if enable then
			SetVehicleExtra(vehicle, extra, false)
			if not IsVehicleExtraTurnedOn(vehicle, extra) then
				QBShared.ChangeVehicleExtra(vehicle, extra, enable)
			end
		else
			SetVehicleExtra(vehicle, extra, true)
			if IsVehicleExtraTurnedOn(vehicle, extra) then
				QBShared.ChangeVehicleExtra(vehicle, extra, enable)
			end
		end
	end
end

QBShared.SetDefaultVehicleExtras = function (vehicle, config)
    -- Clear Extras
    for i=1,20 do
        if DoesExtraExist(vehicle, i) then
            SetVehicleExtra(vehicle, i, 1)
        end
    end

    for id, enabled in pairs(config) do
        QBShared.ChangeVehicleExtra(vehicle, tonumber(id), true)
    end
end

QBShared.StarterItems = {
    ['phone'] = { amount = 1, item = 'phone' },
    ['id_card'] = { amount = 1, item = 'id_card' },
    ['driver_license'] = { amount = 1, item = 'driver_license' },
}