config.php

<?php
require "./lib/config.php";

$configValue = $_GET['name'];

switch ($configValue){
    case "contactmail":
        echo($contactmail);
        break;
    case "sitekey":
        echo($sitekey);
        break;
    case "trackURL":
        echo($trackurl);
        break;
    default:
        echo("notFound");
}