Magento: Redirect Before Authorization

Mage::getSingleton('customer/session')
                    ->setAfterAuthUrl(Mage::helper('core/url')->getCurrentUrl());

Magento: add to email template custom block

It's can by:

{{block type='core/template' area='frontend' template='email/my_email_block.phtml' order=$order shipment=$shipment }}

Then in the template file email/my_email_block.phtml
-> You can access the Shipment object by using $this->getShipment().
-> You can access the Order object by using $this->getOrder().

HTTP_REFERER менять нельзя.

Но для уж очень специальных целей :) можно спомощью curl.

Смена URL страницы без перезагрузки страницы при Ajax догрузке страницы.

Вот ява скрипт:

window.history.replaceState(null, null, newUrl);
window.history.pushState(null, null, newUrl);