Authorize.net ARB class Automated recurring billing class

<?php

class AuthnetARBException extends Exception {}

class WP_Invoice_AuthnetARB
{
    private $login;
    private $transkey;

    private $params  = array();
    private $sucess  = false;
    private $error   = true;

    var $xml;
    var $response;
    private $resultCode;
    private $code;
    private $text;
    private $subscrId;

    public function __construct()
    {
 
        $this->url = stripslashes(get_option("wp_invoice_recurring_gateway_url"));
        $this->login = stripslashes(get_option("wp_invoice_gateway_username"));
        $this->transkey = stripslashes(get_option("wp_invoice_gateway_tran_key"));

    }

    private function process($retries = 3)
    {
        $count = 0;
        while ($count < $retries)
        {
            $ch = curl_init();
  
   //required for GoDaddy
   if(get_option('wp_invoice_using_godaddy') == 'yes') {
   curl_setopt ($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
   curl_setopt ($ch, CURLOPT_PROXY,"http://proxy.shr.secureserver.net:3128");
   curl_setopt ($ch, CURLOPT_TIMEOUT, 120);
   }
   //required for GoDaddy

            curl_setopt($ch, CURLOPT_URL, $this->url);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_HTTPHEADER, Array("Content-Type: text/xml"));
            curl_setopt($ch, CURLOPT_HEADER, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $this->xml);
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
            $this->response = curl_exec($ch);
            $this->parseResults();
            if ($this->resultCode === "Ok")
            {
                $this->success = true;
                $this->error   = false;
                break;
            }
            else
            {
                $this->success = false;
                $this->error   = true;
                break;
            }
            $count++;
        }
        curl_close($ch);
    }

    public function createAccount()
    {
        $this->xml = "<?xml version='1.0' encoding='utf-8'?>
                      <ARBCreateSubscriptionRequest xmlns='AnetApi/xml/v1/schema/AnetApiSchema.xsd'>
                          <merchantAuthentication>
                              <name>" . $this->login . "</name>
                              <transactionKey>" . $this->transkey . "</transactionKey>
                          </merchantAuthentication>
                          <refId>" . $this->params['refID'] ."</refId>
                          <subscription>
                              <name>". $this->params['subscrName'] ."</name>
                              <paymentSchedule>
                                  <interval>
                                      <length>". $this->params['interval_length'] ."</length>
                                      <unit>". $this->params['interval_unit'] ."</unit>
                                  </interval>
                                  <startDate>" . $this->params['startDate'] . "</startDate>
                                  <totalOccurrences>". $this->params['totalOccurrences'] . "</totalOccurrences>
                                  <trialOccurrences>". $this->params['trialOccurrences'] . "</trialOccurrences>
                              </paymentSchedule>
                              <amount>". $this->params['amount'] ."</amount>
                              <trialAmount>" . $this->params['trialAmount'] . "</trialAmount>
                              <payment>
                                  <creditCard>
                                      <cardNumber>" . $this->params['cardNumber'] . "</cardNumber>
                                      <expirationDate>" . $this->params['expirationDate'] . "</expirationDate>
                                  </creditCard>
                              </payment>
                              <order>
                                  <invoiceNumber>" . $this->params['orderInvoiceNumber'] . "</invoiceNumber>
                                  <description>" . $this->params['orderDescription'] . "</description>
                              </order>
                              <customer>
                                  <id>" . $this->params['customerId'] . "</id>
                                  <email>" . $this->params['customerEmail'] . "</email>
                                  <phoneNumber>" . $this->params['customerPhoneNumber'] . "</phoneNumber>
                                  <faxNumber>" . $this->params['customerFaxNumber'] . "</faxNumber>
                              </customer>
                              <billTo>
                                  <firstName>". $this->params['firstName'] . "</firstName>
                                  <lastName>" . $this->params['lastName'] . "</lastName>
                                  <company>" . $this->params['company'] . "</company>
                                  <address>" . $this->params['address'] . "</address>
                                  <city>" . $this->params['city'] . "</city>
                                  <state>" . $this->params['state'] . "</state>
                                  <zip>" . $this->params['zip'] . "</zip>
                              </billTo>
                              <shipTo>
                                  <firstName>". $this->params['shipFirstName'] . "</firstName>
                                  <lastName>" . $this->params['shipLastName'] . "</lastName>
                                  <company>" . $this->params['shipCompany'] . "</company>
                                  <address>" . $this->params['shipAddress'] . "</address>
                                  <city>" . $this->params['shipCity'] . "</city>
                                  <state>" . $this->params['shipState'] . "</state>
                                  <zip>" . $this->params['shipZip'] . "</zip>
                              </shipTo>
                          </subscription>
                      </ARBCreateSubscriptionRequest>";
        $this->process();
    }

    public function updateAccount()
    {
        $this->xml = "<?xml version='1.0' encoding='utf-8'?>
                      <ARBUpdateSubscriptionRequest xmlns='AnetApi/xml/v1/schema/AnetApiSchema.xsd'>
                          <merchantAuthentication>
                              <name>" . $this->url . "</name>
                              <transactionKey>" . $this->transkey . "</transactionKey>
                          </merchantAuthentication>
                          <refId>" . $this->params['refID'] ."</refId>
                          <subscriptionId>" . $this->params['subscrId'] . "</subscriptionId>
                          <subscription>
                              <name>". $this->params['subscrName'] ."</name>
                              <amount>". $this->params['amount'] ."</amount>
                              <trialAmount>" . $this->params['trialAmount'] . "</trialAmount>
                              <payment>
                                  <creditCard>
                                      <cardNumber>" . $this->params['cardNumber'] . "</cardNumber>
                                      <expirationDate>" . $this->params['expirationDate'] . "</expirationDate>
                                  </creditCard>
                              </payment>
                              <billTo>
                                  <firstName>". $this->params['firstName'] . "</firstName>
                                  <lastName>" . $this->params['lastName'] . "</lastName>
                                  <address>" . $this->params['address'] . "</address>
                                  <city>" . $this->params['city'] . "</city>
                                  <state>" . $this->params['state'] . "</state>
                                  <zip>" . $this->params['zip'] . "</zip>
                                  <country>" . $this->params['country'] . "</country>
                              </billTo>
                          </subscription>
                      </ARBUpdateSubscriptionRequest>";
        $this->process();
    }

    public function deleteAccount()
    {
        $this->xml = "<?xml version='1.0' encoding='utf-8'?>
                      <ARBCancelSubscriptionRequest xmlns='AnetApi/xml/v1/schema/AnetApiSchema.xsd'>
                          <merchantAuthentication>
                              <name>" . $this->url . "</name>
                              <transactionKey>" . $this->transkey . "</transactionKey>
                          </merchantAuthentication>
                          <refId>" . $this->params['refID'] ."</refId>
                          <subscriptionId>" . $this->params['subscrId'] . "</subscriptionId>
                      </ARBCancelSubscriptionRequest>";
        $this->process();
    }

    private function parseResults()
    {
        $this->resultCode = $this->parseXML('<resultCode>', '</resultCode>');
        $this->code       = $this->parseXML('<code>', '</code>');
        $this->text       = $this->parseXML('<text>', '</text>');
        $this->subscrId   = $this->parseXML('<subscriptionId>', '</subscriptionId>');
    }

    private function parseXML($start, $end)
    {
        return preg_replace('|^.*?'.$start.'(.*?)'.$end.'.*?$|i', '$1', substr($this->response, 334));
    }

    public function setParameter($field = "", $value = null)
    {
        $field = (is_string($field)) ? trim($field) : $field;
        $value = (is_string($value)) ? trim($value) : $value;
        if (!is_string($field))
        {
            throw new AuthnetARBException("setParameter() arg 1 must be a string or integer: " . gettype($field) . " given.");
        }
        if (!is_string($value) && !is_numeric($value) && !is_bool($value))
        {
            throw new AuthnetARBException("setParameter() arg 2 must be a string, integer, or boolean value: " . gettype($value) . " given.");
        }
        if (empty($field))
        {
            throw new AuthnetARBException("setParameter() requires a parameter field to be named.");
        }
        if ($value === "")
        {
            throw new AuthnetARBException("setParameter() requires a parameter value to be assigned: $field");
        }
        $this->params[$field] = $value;
    }

    public function isSuccessful()
    {
        return $this->success;
    }

    public function isError()
    {
        return $this->error;
    }

    public function getResponse()
    {
        return strip_tags($this->text);
    }

    public function getResponseCode()
    {
        return $this->code;
    }

    public function getSubscriberID()
    {
        return $this->subscrId;
    }
}

?>