Any PhPFreaks here that also know magento? Extend Data helper

[HenkDeVries]

Hope that there are some people around that can help me, I just started php so I am already saying sorry :-)

I created a license check for my custom magento module. It's all working fine when I test it but now I need to integrate it with my  module. 

One part needs to go in to the DataHelper the other in my frontend template file. 

 

I have checked some examples and what they do is extend the helper file and then get the variable in the frontend template file with $X= $this->helper('X')->X();

Code for in my frontend temlate file (just to test if it's working)

if ( $var === false ) {
   echo '<img style="float: center;height:300px;width:auto;" src="http://clipartist.info/Art/April/al_with_red_flag_cybergedeon_al_with_red_flag-999px.png" alt="">';
}

Working license check

function checkLicense($key, $url = null) {
	static $wsdl = 'x';

	if ($url == null) {
		$url = $_SERVER['HTTP_HOST'];
	}
	$clientOptions = array(
			'compression' => SOAP_COMPRESSION_ACCEPT | SOAP_COMPRESSION_GZIP,
			//'trace'=> 1, // when the service b0rks, enable the tracing, for easier debugging
	);
	$client = new SoapClient($wsdl, $clientOptions);
	$params = array(
			'LicenseKey' => $key,
			'URL' => $url,
	);
	$checkLicenseResponse = $client->CheckLicense($params);
	return !empty($checkLicenseResponse->IsValid) && $checkLicenseResponse->IsValid === true;
}

$licensekey = Mage::getStoreConfig('SDOCP_options/module/enable_serial'); 
$url = '';
$var = checkLicense($licensekey, $url);

Custom Module Helper

<?php

class Magextension_Sdocp_Helper_Data extends Mage_Core_Helper_Abstract
{
	public function checkIsEnabled()
	{
		$flag	=	Mage::getStoreConfig('SDOCP_options/module/enabled'); 
		return $flag;
	}
	
	public function checkOutOfStockEnabled()
	{
		$flag	=	Mage::getStoreConfig('SDOCP_options/product_page/show_out_of_stock_product'); 
		return $flag;
	}
	
}