Veritrans VT-WEB Notification

/*
    Script By MRSNAX :: http://www.sterli.net/
    Twitter @sterli

    VT-WEB 3.0

    1. First, Since Veritrans won't give right notification each transaction successfully or not. So, I make this code to make all
    developers VT-WEB running handling easy.

    2. You MUST setup all redirection to : this-code.php
       e.g.:

    --> Payment Notification URL        redirect to     this-code.php
    --> Finish Redirect URL         redirect to     this-code.php
    --> UnFinish Redirect URL       redirect to     this-code.php
    --> Error Redirect URL          redirect to     this-code.php

    3. Any suggestion please mention by twitter
    4. Thanks.
*/

require_once("YOUR_VERITRANS_LIBRARIES/Veritrans.php");

// Development
#$server_key = "<your-server-key>";


// TODO : change to production URL for your production Environment
// sandbox/development/testing environment:
$endpoint = "https://api.sandbox.veritrans.co.id/v2/" . $_SESSION["YOUR_ORDER_ID"] . "/status";


// production environment:
// $endpoint = "https://api.veritrans.co.id/v2/" . $_SESSION["YOUR_ORDER_ID"] . "/status";;

$request = curl_init($endpoint);
        curl_setopt($request, CURLOPT_CUSTOMREQUEST, "GET");
        curl_setopt($request, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($request, CURLOPT_SSL_VERIFYPEER, false);
        $auth = sprintf('Authorization: Basic %s', base64_encode($server_key.':'));
        curl_setopt($request, CURLOPT_HTTPHEADER, array(
        'Content-Type: application/json',
        'Accept: application/json',
        $auth
    )
);

$response = json_decode(curl_exec($request));


/* UNCOMMENT FOR debug ONLY
    echo "<pre>";
        print_r($response);
    echo "</pre>";
/* end of debug */

// Feedback $response status
if ($response->transaction_status == 'capture') {
    if ($response->fraud_status == 'challenge') {
    // TODO Set payment status in merchant's database to 'challenge'

    // NOW redirect to success page
    header("location: your-page-success.html");

    }
    else if ($response->fraud_status == 'accept') {
    // TODO Set payment status in merchant's database to 'success'

    // NOW redirect to success page
    header("location: your-page-success.html");
    }

}
else if ($response->transaction_status == 'cancel') {
    if ($response->fraud_status == 'challenge') {
    // TODO Set payment status in merchant's database to 'failure'

    // NOW redirect to success page
    header("location: your-page-unsuccess.html");

    }
    else if ($response->fraud_status == 'accept') {
    // TODO Set payment status in merchant's database to 'failure'

    // NOW redirect to unsuccess page
    header("location: your-page-unsuccess.html");
    }

}
else if ($response->transaction_status == 'deny') {

    // NOW redirect to success page
    header("location: your-page-unsuccess.html");

}