<?php

// Need to enter your payment access key value here
$payment_access_key         = '###YOUR_PAYMENT_ACCESS_KEY###';

// Now, have to encode the $payment_access_key value with the base64 encode
$encoded_data 				= base64_encode($payment_access_key);

// Action Endpoint 
$endpoint                   = 'https://payport.novalnet.de/v2/transaction/details';

// Build the Headers array
$headers = [

	// The Content-Type should be "application/json"
    'Content-Type:application/json',
     
    // The charset should be "utf-8"
    'Charset:utf-8', 
    
    // Optional
    'Accept:application/json', 
    
    // The formed authenticate value (case-sensitive)
    'X-NN-Access-Key:' . $encoded_data, 
];

$data = [];

// Build Merchant Data
$data['transaction'] = [

	// The TID for which you need to get the details
    'tid' => '###NOVALNET_TID###', 
];

// Custom Data
$data['custom'] = [
	
	// Merchant's selected language
	'lang'      => 'EN',
];

// Convert the array to JSON string
$json_data = json_encode($data);

// Handle Response
$response = send_request($json_data, $endpoint, $headers);

function send_request($data, $url, $headers) {

    // Initiate cURL
    $curl = curl_init();
    
    // Set the url
    curl_setopt($curl, CURLOPT_URL, $url);
    
    // Set the result output to be a string
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    
    // Set the POST value to true (mandatory)
    curl_setopt($curl, CURLOPT_POST, true);
    
    // Set the post fields
    curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    
    // Set the headers
    curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);

    // Execute cURL
    $result = curl_exec($curl);

    // Handle cURL error
	if (curl_errno($curl)) {
		echo 'Request Error:' . curl_error($curl);
		return $result;
	}
	
	// Close cURL
	curl_close($curl);  
	
	// Decode the JSON string
	$result = json_decode($result);
	
	return $result;
}

?>