listening.php

<?php
include 'remita_constants.php';
require 'server/conn.php';
$json = file_get_contents('php://input');
//die($json);
$arr = json_decode($json, true);
try {
    if ($arr != null) {
        foreach ($arr as $key => $value) {
            $orderRef = $value['orderRef'];
            //Confirm transaction Status to be sure it is coming from Remita
            $response = remita_transaction_details($orderRef);
            $response_code = $response['status'];
            $response_reason = $response['message'];
            $rrr = $response['RRR'];
            $orderId = $response['orderId'];
            //die($response_reason);
            if ($response_code == '01' || $response_code == '00') {
                //Payment Successful, You can Update Status to Paid here on Database;
                updateDatabase($orderRef, $response_code, $rrr, $conn);
            }
        }
        exit('OK');
    }

} catch (Exception $e) {
    exit('Not OK');
}

function remita_transaction_details($orderId)
{
    $mert = "";
    $api_key = "";
    $mode = "Test";
    $hash_string = $orderId . $api_key . $mert;
    $hash = hash('sha512', $hash_string);
    if ($mode == 'Test') {
        $query_url = 'http://www.remitademo.net/remita/ecomm';
    } else if ($mode == 'Live') {
        $query_url = 'https://login.remita.net/remita/ecomm';
    }
    $url = $query_url . '/' . $mert . '/' . $orderId . '/' . $hash . '/' . 'orderstatus.reg';
    $result = file_get_contents($url);
    $response = json_decode($result, true);
    return $response;
}

?>