Page Comparison

<?php
   $pass $client_pass = '***';
    $data['key']= '***';
    $data['action'] = 'CREATE';
    $data['payment'] = 'C2A';
    $data['order'] = '123ABC';
    $data['description'] = 'ТестоваяТестова оплата';
    $data['amount'] = '356.00';
    $data['qr'] = 'Y';
    $data['url'] = 'https://google.com';
    $data['sign'] = md5(
                        strtoupper(
                            $data['key'].
                            $data['payment'].
                            $data['amount'].
          strrev($pass                  strrev($client_pass)
                        )
                    );
   
    $url = 'https://secure.platononline.com/post-invoice/';
    $crq = curl_init();
    curl_setopt($crq, CURLOPT_URL, $url);
    curl_setopt($crq, CURLOPT_HEADER, 0);
    curl_setopt($crq, CURLOPT_POST, 1);
    curl_setopt($crq, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($crq, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($crq, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($crq, CURLOPT_POSTFIELDS, http_build_query($data));
    $result = curl_exec($crq);
        if (curl_errno($crq)) {
            echo 'ERROR: '.curl_error($crq);
        }else{
        echo $result;
        }
    curl_close($crq);

var url = "https://secure.platononline.com/post-invoice/";

var httpRequest = (HttpWebRequest)WebRequest.Create(url);
httpRequest.Method = "POST";

httpRequest.ContentType = "application/x-www-form-urlencoded";

var data = "key=*****&action=CREATE&payment=C2A&order=123ABC&description=Test%20Payment&amount=356.00&qr=Y&sign=*********************";

using (var streamWriter = new StreamWriter(httpRequest.GetRequestStream()))
  {
    streamWriter.Write(data);
  }

var httpResponse = (HttpWebResponse)httpRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
  {
    var result = streamReader.ReadToEnd();
  }

Платника буде відправлено за посиланням вказаним вами в параметр url з додаванням order методом GET