Example of a simple php script to tell an iphone app which add network to use dynamically.

gistfile1.txt

<?php
        $app = $_GET['APP'];
        $version = $_GET['VERSION'];

        // Map each application / version to a chance table
        $appTbl = array(
                "REMOTEKITTENFREE"=>array(
                        "1.1" => array(
                                array(0.1, "MOBCLIX"),
                                array(0.9, "ADMOB")
                        )
                )
        );

        $chanceTbl = $appTbl[$app][$version];
        $sum = 0;
        $dice = rand(0, 1);
        foreach($chanceTbl as $network){
                $sum += $network[0];
                if($dice <= $sum){
                        $resultNet = $network[1];
                        break;
                }
        }

        $response = array("NETWORK"=>$resultNet);
        header('Content-type: application/json');
        echo json_encode($response);
?>