Help in trying to debug payment module

[strangename]

I am in a bit of a fix and am looking for any help. I am trying to install Realex on to a site and am having a problem. The payment process goes fine until checkout_confirmation.php where only part of the screen is produced...the bottom part with the button to confirm the order is correct does not show (it works fine with other modules). I have spoken to Realex who have said to send them what data I am sending so they can see if it is hitting their server.

 

What is the best way to produce an output that I can send to them? I have included the Realex module (they wrote it but can't help!!) below for reference.

 

Thanks for any help in advance, no matter how small - John

<?php
/*
 $
*/

 class realex {
var $code, $title, $description, $enabled;
var $oid;

// class constructor
function realex() {
  global $order;

  $this->code = 'realex';
  $this->title = MODULE_PAYMENT_REALEX_TEXT_TITLE;
  $this->description = MODULE_PAYMENT_REALEX_TEXT_DESCRIPTION;
  $this->sort_order = MODULE_PAYMENT_REALEX_SORT_ORDER;
  $this->enabled = ((MODULE_PAYMENT_REALEX_STATUS == 'True') ? true : false);

  if ((int)MODULE_PAYMENT_REALEX_ORDER_STATUS_ID > 0) {
	$this->order_status = MODULE_PAYMENT_REALEX_ORDER_STATUS_ID;
  }

  if (is_object($order)) $this->update_status();

$this->form_action_url = 'https://epage.payandshop.com/epage.cgi';
}

// class methods
function update_status() {
  global $order;

  if ( ($this->enabled == true) && ((int)MODULE_PAYMENT_REALEX_ZONE > 0) ) {
	$check_flag = false;
	$check_query = tep_db_query("select zone_id from " . TABLE_ZONES_TO_GEO_ZONES . " where geo_zone_id = '" . MODULE_PAYMENT_REALEX_ZONE . "' and zone_country_id = '" . $order->billing['country']['id'] . "' order by zone_id");
	while ($check = tep_db_fetch_array($check_query)) {
	  if ($check['zone_id'] < 1) {
		$check_flag = true;
		break;
	  } elseif ($check['zone_id'] == $order->billing['zone_id']) {
		$check_flag = true;
		break;
	  }
	}

	if ($check_flag == false) {
	  $this->enabled = false;
	}
  }
}

function javascript_validation() {
  return false;
}

function selection() {
  return array('id' => $this->code,
			   'module' => $this->title);
}

function pre_confirmation_check() {
  return false;
}

function confirmation() {
  return false;
}

function process_button() {
  global $osC_Session, $order, $currencies;

  if (MODULE_PAYMENT_REALEX_CURRENCY == 'Selected Currency') {
	$my_currency = $osC_Session->value('currency');
  } else {
	$my_currency = substr(MODULE_PAYMENT_REALEX_CURRENCY, 5);
  }

  if (!in_array($my_currency, array('CHF', 'EUR', 'GBP', 'JPY', 'USD', 'SEK', 'HKD'))) {
	$my_currency = 'USD';
  }

  //Replace these with the values you receive from Realex Payments
  $merchantid = MODULE_PAYMENT_REALEX_ID;
  $secret = MODULE_PAYMENT_REALEX_SECRET;

  //The code below is used to create the timestamp format required by Realex Payments
  $timestamp = strftime("%Y%m%d%H%M%S");
  mt_srand((double)microtime()*1000000);

  /* orderid: Timestamp - randvalue */

  $orderid = $timestamp . "-" . mt_rand(1, 999);

  $curr = $my_currency;
  $amount = number_format($order->info['total'] * $currencies->get_value($my_currency), $currencies->get_decimal_places($my_currency)) * 100;


  /*md5 crypt*/
  $tmp = "$timestamp.$merchantid.$orderid.$amount.$curr";
  $md5hash = md5($tmp);
  $tmp = "$md5hash.$secret";
  $md5hash = md5($tmp);
  $process_button_string = tep_draw_hidden_field('MERCHANT_ID', MODULE_PAYMENT_REALEX_ID) .
						   tep_draw_hidden_field('osCsid', session_id()) .
						   tep_draw_hidden_field('ORDER_ID', $orderid) .
						   tep_draw_hidden_field('AMOUNT', $amount) .
						   tep_draw_hidden_field('CURRENCY', $curr) .
						   tep_draw_hidden_field('TIMESTAMP', $timestamp) .
						   tep_draw_hidden_field('AUTO_SETTLE_FLAG', 1) .
						   tep_draw_hidden_field('RETURN_TSS', 1) .
						   tep_draw_hidden_field('BILLING_CODE', $order->billing['postcode']) .
						   tep_draw_hidden_field('BILLING_CO', $order->billing['country']['iso_code_2']) .
						   tep_draw_hidden_field('MD5HASH', $md5hash).
						   tep_draw_hidden_field('COMMENT', urldecode($order->billing['firstname']) . ' ' . urldecode($order->billing['lastname']) . (strlen($order->billing['company'])>0?' ' . urldecode($order->billing['company']):'') ) .
						   tep_draw_hidden_field('PROD_ID', STORE_NAME);

  return $process_button_string;
}

function before_process() {
  global $HTTP_POST_VARS;

  $error = false;

  $merchantid = MODULE_PAYMENT_REALEX_ID;
  $secret = MODULE_PAYMENT_REALEX_SECRET;

  $timestamp = $HTTP_POST_VARS['TIMESTAMP'];
  $result = $HTTP_POST_VARS['RESULT'];
  $orderid = $HTTP_POST_VARS['ORDER_ID'];
  $message = $HTTP_POST_VARS['MESSAGE'];
  $authcode = $HTTP_POST_VARS['AUTHCODE'];
  $pasref = $HTTP_POST_VARS['PASREF'];
  $md5hash_post = $HTTP_POST_VARS['MD5HASH'];

  $tmp = "$timestamp.$merchantid.$orderid.$result.$message.$pasref.$authcode";
  $md5hash_new = md5($tmp);
  $tmp = "$md5hash_new.$secret";
  $md5hash_new = md5($tmp);

  //Check to see if hashes match or not
  if ($md5hash_new != $md5hash_post) {
							$payment_error_return = 'payment_error=' . $this->code . '&error=' . TEXT_REALEX_HASH_ERROR;
							tep_redirect(tep_href_link(FILENAME_CHECKOUT_PAYMENT, $payment_error_return, 'SSL', true, false));
  }

  if ($result !='00') {
							$payment_error_return = 'payment_error=' . $this->code . '&error=' . urlencode($message);
							tep_redirect(tep_href_link(FILENAME_CHECKOUT_PAYMENT, $payment_error_return, 'SSL', true, false));
  }


  return false;
}

function after_process() {
  return false;
}


function get_error() {
  if (PHP_VERSION < 4.1) {
	global $_GET;
  }

  $error = array('title' => REALEX_ERROR_TITLE,
				 'error' => ((isset($_GET['error'])) ? stripslashes(urldecode($_GET['error'])) : IPAYMENT_ERROR_MESSAGE));

  return $error;
}

function output_error() {
  return false;
}

function check() {
  if (!isset($this->_check)) {
	$check_query = tep_db_query("select configuration_value from " . TABLE_CONFIGURATION . " where configuration_key = 'MODULE_PAYMENT_REALEX_STATUS'");
	$this->_check = tep_db_num_rows($check_query);
  }
  return $this->_check;
}

function install() {
  tep_db_query("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, date_added) values ('Enable Realex Module', 'MODULE_PAYMENT_REALEX_STATUS', 'True', 'Do you want to accept Realex payments?', '6', '3', 'tep_cfg_select_option(array(\'True\', \'False\'), ', now())");
  tep_db_query("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Merchant ID', 'MODULE_PAYMENT_REALEX_ID', 'MerchantID', 'The merchant ID provided by realex', '6', '5', now())");
  tep_db_query("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Shared Secret', 'MODULE_PAYMENT_REALEX_SECRET', 'Secret', 'The Shared Secret provided by realex', '6', '4', now())");
  tep_db_query("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, date_added) values ('Transaction Currency', 'MODULE_PAYMENT_REALEX_CURRENCY', 'Selected Currency', 'The currency to use for credit card transactions', '6', '6', 'tep_cfg_select_option(array(\'Selected Currency\',\'Only USD\',\'Only CHF\',\'Only EUR\',\'Only GBP\',\'Only JPY\', \'Only HKD\', \'Only SEK\'), ', now())");
  tep_db_query("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Sort order of display.', 'MODULE_PAYMENT_REALEX_SORT_ORDER', '0', 'Sort order of display. Lowest is displayed first.', '6', '0', now())");
  tep_db_query("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, use_function, set_function, date_added) values ('Payment Zone', 'MODULE_PAYMENT_REALEX_ZONE', '0', 'If a zone is selected, only enable this payment method for that zone.', '6', '2', 'tep_get_zone_class_title', 'tep_cfg_pull_down_zone_classes(', now())");
  tep_db_query("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, use_function, date_added) values ('Set Order Status', 'MODULE_PAYMENT_REALEX_ORDER_STATUS_ID', '0', 'Set the status of orders made with this payment module to this value', '6', '0', 'tep_cfg_pull_down_order_statuses(', 'tep_get_order_status_name', now())");
}

function remove() {
  tep_db_query("delete from " . TABLE_CONFIGURATION . " where configuration_key in ('" . implode("', '", $this->keys()) . "')");
}

function keys() {
  return array('MODULE_PAYMENT_REALEX_STATUS', 'MODULE_PAYMENT_REALEX_ID','MODULE_PAYMENT_REALEX_SECRET',  'MODULE_PAYMENT_REALEX_CURRENCY', 'MODULE_PAYMENT_REALEX_ZONE', 'MODULE_PAYMENT_REALEX_ORDER_STATUS_ID', 'MODULE_PAYMENT_REALEX_SORT_ORDER');
}
 }
?>

[strangename]

I keep forgetting I can't edit these posts.

 

***Update***

 

What I need to know is where is the best place to place an "echo $data" statement?