sv_utils.lua

Framework = "qb"
local Core

if GetResourceState("qbx_core") == "started" or Config.framework == "qbx"  then
    Framework = "qbx"
    Core = exports.qbx_core
    lib.print.info("Detected Framework: QBOX")
elseif GetResourceState("es_extended") == "started" or Config.framework == "esx" then
    Framework = "esx"
    Core = ESX
    lib.print.info("Detected Framework: ESX")
elseif GetResourceState("qb-core") == "started" or Config.framework == "qb"  then 
    Framework = "qb"
    Core = exports['qb-core']:GetCoreObject()
    lib.print.info("Detected Framework: QB")
else
    Framework = Config.framework
end  

function GetPlayerFullName(playerId)
    if Framework == "qb" then 
        local Player = Core.Functions.GetPlayer(playerId)
        local fullname = Player.PlayerData.charinfo.firstname .. " " .. Player.PlayerData.charinfo.lastname
        return fullname
    elseif Framework == "esx" then 
        local xPlayer = Core.GetPlayerFromId(playerId)
        local fullname = xPlayer.getName()
        return fullname
    elseif Framework == "qbx" then 
        local Player = Core:GetPlayer(playerId)
        local fullname = Player.PlayerData.charinfo.firstname .. " " .. Player.PlayerData.charinfo.lastname
        return fullname
    else 
        --Custom Framework here
        return "Unknown"
    end
end