$options = array('debug' => true);
$databaseID = '';

$vtrenz =  new Vtrenz_Api($options);

$contact = $vtrenz->getContactData($databaseID,'','', $usersEmailAddress);
return $contact->{'single-response'}
     ->{'outgoing-responses'}
     ->response
     ->{'outgoing-data'}
     ->{'contact'}->field[1]; //returns the iMarketingSyncID field

class Vtrenz_Api {

    private $username = '';
    private $password =  '';
    private $wsdl= 'http://services.vtrenz.net/receiver.cfc?wsdl';
    private $xml = NULL;
    private $incomingData = NULL;
    private $request = NULL;
    private $_debugMode = false;

    public function  __construct($options = null) {

        if ($options !== null) {
            $this->setOptions($options);
        }

        $this->xml = new SimpleXMLElement('<incoming-requests></incoming-requests>');
        $this->request = $this->xml->addChild('request');
        $this->incomingData = $this->request->addChild('incoming-data');
    }

    /**
     * Set Options
     *
     * Allows setting options as an associative array of option => value pairs.
     *
     * @param array $options
     */
    private function setOptions($options)
    {
        foreach ($options as $key => $value) {
            switch ($key) {
                case 'debug':
                    $this->setDebugMode($value);
                    break;
            }
        }
    }

    /**
     * Set debug mode
     *
     * @param  bool $value
     */
    private function setDebugMode($value)
    {
        $this->_debugMode = $value;
    }

    /**
     * Self destruct then re-instantiate
     */
    private function destruct() {
        unset($this->xml);
        $this->__construct();
    }

    /**
     * Transmit SOAP Call
     *
     * @param string $method
     * @return SimpleXMLElement
     */
    private function transmit($method) {
        $this->request->addAttribute('description', $method);

        $startTime = date('r');
       
        $this->client = new Zend_Soap_Client($this->wsdl, array('soap_version' => SOAP_1_1));
        $result = $this->client->incomingRequest($this->username, $this->password, $this->xml->asXML());
       
        if($this->_debugMode)
            $this->printDebug($method, $this->client->getLastRequest(), $result, $startTime);

        $this->destruct();
        return new SimpleXMLElement($result,LIBXML_NOCDATA);

    }

    /**
     * Print debug info
     *
     * @param string $method
     * @param string $lastRequest
     * @param string $result
     * @param string $startTime
     */
    private function printDebug($method, $lastRequest, $result, $startTime)
    {
        echo "<h1>Vtrend Debug Info</h1>\n\r";
        echo "<h2>". $method ."</h2>\n\r";
        echo "<h4>Request</h4>\n\r";
        echo $lastRequest;
        echo "<h4>Response</h4>\n\r";
        echo $result;
        echo "<h4>Timestamp</h4>\n\r";
        echo "<h5>Start Time</h5>\n\r";
        echo $startTime;
        echo "<h5>Stop Time</h5>\n\r";
        echo date('r');
    }

    /**
     * Inserts a contact to an active campaign in the Vtrenz marketing database
     *
     * @param string $campaignID
     * @param string $contacts
     * @return SimpleXMLElement
     */
    public function insertCampaignParticipant($campaignID,  $contacts = array()) {
        $campaign = $this->incomingData->addChild('campaign');
        $campaign->addAttribute('campaignID', $campaignID);

        $i = 0;
        foreach($contacts as $contact) {
            $contactNode[$i] = $campaign->addChild('contact');

            foreach($contact as $key => $val) {
                $contactNode[$i]->addAttribute($key, $val);
            }
            $i++;
        }

        return $this->transmit(__FUNCTION__);
    }

    /**
     * Sends a one time email from from Vtrenz
     *
     * @param string $messageID
     * @param array $contacts
     * @param array $settings
     * @param array $linkOptions
     * @return SimpleXMLElement
     */
    public function sendOneOffEmail($messageID, $contacts = array(), $settings = NULL, $linkOptions = NULL) {
        $email = $this->incomingData->addChild('email-message');
        $email->addAttribute('messageID', $messageID);

        if(isset($settings)) {
            $settingsNode = $email->addChild('settings');

            foreach($settings as $key => $val) {
                $settingsNode->addAttribute($key, $val);
            }
        }

        if(isset($linkOptions)) {
            $options = $email->addChild('link-options');

            foreach($linkOptions as $key => $val) {
                $options->addAttribute($key, $val);
            }
        }

        $i = 0;
        foreach($contacts as $contact) {
            $contactNode[$i] = $email->addChild('contact');
           
            foreach($contact as $key => $val) {
                $contactNode[$i]->addAttribute($key, $val);
            }
            $i++;
        }

        return $this->transmit(__FUNCTION__);
    }

    public function insertContact($dbID, $fields = array()) {
        $contact = $this->incomingData->addChild('contact');
        $contact->addAttribute('databaseID', $dbID);

        $i = 0;
        foreach($fields as $key => $val) {
            $field[$i] = $contact->addChild('field', $val);
            $field[$i]->addAttribute('id', $key);
            $i++;
        }

        return $this->transmit(__FUNCTION__);
    }

    public function getEmailMessageStatus($messageID) {
        $emailMessage = $this->incomingData->addChild('email-message');
        $emailMessage->addAttribute('messageID', $messageID);

    return $this->transmit(__FUNCTION__);
    }

    public function getContactData($dbID, $iMarketingSyncID = NULL, $syncID = NULL, $email = NULL, $webSyncID = NULL ) {
       
        $contact = $this->incomingData->addChild('contact');
        $contact->addAttribute('databaseID', $dbID);

        if(isset($iMarketingSyncID))
            $contact->addAttribute('iMarketingSyncID', $iMarketingSyncID);

        if(isset($syncID))
            $contact->addAttribute('syncID', $syncID);

        if(isset($email))
            $contact->addAttribute('email', $email);

        if(isset($webSyncID))
            $contact->addAttribute('webSyncID', $webSyncID);
       
        return $this->transmit(__FUNCTION__);
    }
}