Programmatically: How to create custom Magento helpers

Step 1: Create a new PHP file

Create a new PHP file in the app/code/local/ YourCompany/YourModule/Helper directory (replace YourCompany and YourModule with your actual company and module names). Let's call it MyHelper.php. MyHelper.php

	namespace YourCompany\YourModule\Helper;

	class MyHelper extends Mage_Core_Helper_Abstract
 {
    public function getHelloWorld()
    {
        return 'Hello, World!';
    }
 }
	

Step 2: Declare the helper in the module's config file

In your module's etc/module.xml file, declare the helper by adding the following code:

		
    
        YourCompany_YourModule_Helper_MyHelper
    
	
	

Step 3: Use the helper in your Magento code

Now you can use your custom helper in your Magento code by injecting it into your class. For example, let's say you have a controller class MyController.php in the same directory:

namespace YourCompany\YourModule\Controller;

class MyController extends Mage_Core_Controller_Varien_Action
{
    protected $_helper;

    public function __construct(YourCompany_YourModule_Helper_MyHelper $helper)
    {
        $this->_helper = $helper;
    }

    public function indexAction()
    {
        $message = $this->_helper->getHelloWorld();
        // Use the message in your controller action
    }
	}