I would like to add a new block in the customer registration, edit and billing forms. This block will contain a dropdown control where the customer can select if he wants to register as a company or as an individual.

At first, I edited billing.phtml and added the following:

<li class="fields">
    <?php echo $this->getLayout()->createBlock('core/template')->setTemplate('mynamespace/mymodule/customer/widget/registeras.phtml')->toHtml(); ?>

This is working fine, but instead of using 'core/template', I would like to create my custom typed block.

I wrote this in the config:


Then I created the class of my block:

class Mynamespace_Mymodule_Block_Widget_Registeras extends Mage_Customer_Block_Widget_Abstract
    public function _construct()

        // default template location

     * Get current customer from session
     * @return Mage_Customer_Model_Customer
    public function getCustomer()
        return Mage::getSingleton('customer/session')->getCustomer();

Now I replaced:

$this->getLayout()->createBlock('core/template')->setTemplate('mynamespace/mymodule/customer/widget/registeras.phtml')->toHtml(); ?>

by this:

<?php echo $this->getLayout()->createBlock('mynamespace_mymodule/widget_registeras')->setObject($this->getQuote()->getCustomer())->toHtml(); ?>

But it's not working. Here is the error I get:

exception 'Mage_Core_Exception' with message 'Invalid block type: Mage_Mynamespace_Mymodule_Block_Widget_Registeras' in E:\myworkspace\magento\app\Mage.php:595 Stack trace: 0 E:\myworkspace\magento\app\code\core\Mage\Core\Model\Layout.php(495): Mage::throwException('Invalid block t...') 1 E:\myworkspace\magento\app\code\core\Mage\Core\Model\Layout.php(437): Mage_Core_Model_Layout->_getBlockInstance('mynamespace_my...', Array) 2 E:\myworkspace\magento\app\code\core\Mage\Core\Model\Layout.php(472): Mage_Core_Model_Layout->createBlock('mynamespace_my...', 'widget_register...') ...

I could not understand why magento adds 'Mage_' to the class name.

I also tried to load it using the layout and getChildHtml() but I could not get it work better.

Any help would be appreciated.

Thank you

2 Answers 2


Use this

<?php echo $this->getLayout()->createBlock('mymodule/widget_registeras')->setObject($this->getQuote()->getCustomer())->toHtml(); ?>

Hope this will solve your problem!

  • Thank you but it is not working. I got the same error as above ('Mage_' is added at the beginning of the class, I guess because billing.phtm is a mage block..) + I get a second error: exception 'Mage_Core_Exception' with message 'Invalid block type: Mynamespace_Mymodule_Block_Widget_Registeras_Widget_Registeras' => this time 'Mage_' is not added but '_Widget_Registeras' is written twice.. Strange!
    – max
    Commented Apr 8, 2016 at 11:54

Typically Magento will prepend "Mage_" if you don't have your <blocks> set up quite right in the config.xml.

Try replacing this...


with this...


Also, when you are calling createBlock() you will use just "mymodule/widget_registeras" like Asish Hira says. The first part of that before the slash / will reference the <mymodule> you set up inside your <blocks> of the config.xml

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