谁帮忙看一下这个插件怎么处理？

秘钥：887c5a2b0d1bcf5b169ac8d63806bd13

项目ID：88709

开发文档：https://developers.paysera.com/en/payments/current

测试文档使用说明：

1. <?php
2.  
3. require_once('WebToPay.php');
4.  
5. function get_self_url() {
6. $s = substr(strtolower($_SERVER['SERVER_PROTOCOL']), 0,
7. strpos($_SERVER['SERVER_PROTOCOL'], '/'));
8.  
9. if (!empty($_SERVER["HTTPS"])) {
10. $s .= ($_SERVER["HTTPS"] == "on") ? "s" : "";
11. }
12.  
13. $s .= '://'.$_SERVER['HTTP_HOST'];
14.  
15. if (!empty($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != '80') {
16. $s .= ':'.$_SERVER['SERVER_PORT'];
17. }
18.  
19. $s .= dirname($_SERVER['SCRIPT_NAME']);
20.  
21. return $s;
22. }
23.  
24. try {
25. $self_url = get_self_url();
26.  
27. $request = WebToPay::redirectToPayment(array(
28. 'projectid' => 88709, //项目ID
29. 'sign_password' => '887c5a2b0d1bcf5b169ac8d63806bd13',  //秘钥签名
30. 'orderid' => 0,
31. 'amount' => 1000,
32. 'currency' => 'EUR',
33. 'country' => 'LT',
34. 'accepturl' => $self_url.'/accept.php',
35. 'cancelurl' => $self_url.'/cancel.php',
36. 'callbackurl' => $self_url.'/callback.php',
37. 'test' => 0,
38. ));
39. } catch (WebToPayException $e) {
40. // handle exception
41. }

一个不错的外币收款通道，谁能给看一下，怎么可以集成到HUBBS里面了~！